Blank page problem

Software Support
1

hi ,
after installed ojs-3.3.0-14 - i got the message successfully installed. After entering the login credentials the system automatically redirected me to: “http://localhost/ojs3/index.php/index/admin/contexts” - which is show nothing (blank page) - if I click back button on the browser: the system shows the user profile normally - i need help :expressionless: - the following is the error log:
— File cleaned up by Wampserver —
— on 2023-03-13 08:51
[13-Mar-2023 08:51:56 UTC] PHP Fatal error: Uncaught GuzzleHttp\Exception\RequestException: cURL error 60: SSL certificate problem: unable to get local issuer certificate (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) in C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php:201
Stack trace:
#0 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php(155): GuzzleHttp\Handler\CurlFactory::createRejection(Object(GuzzleHttp\Handler\EasyHandle), Array)
#1 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php(105): GuzzleHttp\Handler\CurlFactory::finishError(Object(GuzzleHttp\Handler\CurlHandler), Object(GuzzleHttp\Handler\EasyHandle), Object(GuzzleHttp\Handler\CurlFactory))
#2 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlHandler.php(43): GuzzleHttp\Handler\CurlFactory::finish(Object(GuzzleHttp\Handler\CurlHandler), Object(GuzzleHttp\Handler\EasyHandle), Object(GuzzleHttp\Handler\CurlFactory))
#3 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\Proxy.php(28): GuzzleHttp\Handler\CurlHandler->__invoke(Object(GuzzleHttp\Psr7\Request), Array)
#4 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\Proxy.php(51): GuzzleHttp\Handler\Proxy::GuzzleHttp\Handler{closure}(Object(GuzzleHttp\Psr7\Request), Array)
#5 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\PrepareBodyMiddleware.php(37): GuzzleHttp\Handler\Proxy::GuzzleHttp\Handler{closure}(Object(GuzzleHttp\Psr7\Request), Array)
#6 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Middleware.php(29): GuzzleHttp\PrepareBodyMiddleware->__invoke(Object(GuzzleHttp\Psr7\Request), Array)
#7 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\RedirectMiddleware.php(70): GuzzleHttp\Middleware::GuzzleHttp{closure}(Object(GuzzleHttp\Psr7\Request), Array)
#8 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\RedirectMiddleware.php(107): GuzzleHttp\RedirectMiddleware->__invoke(Object(GuzzleHttp\Psr7\Request), Array)
#9 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\RedirectMiddleware.php(72): GuzzleHttp\RedirectMiddleware->checkRedirect(Object(GuzzleHttp\Psr7\Request), Array, Object(GuzzleHttp\Psr7\Response))
#10 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\promises\src\FulfilledPromise.php(41): GuzzleHttp\RedirectMiddleware->GuzzleHttp{closure}(Object(GuzzleHttp\Psr7\Response))
#11 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\promises\src\TaskQueue.php(48): GuzzleHttp\Promise\FulfilledPromise::GuzzleHttp\Promise{closure}()
#12 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\promises\src\Promise.php(248): GuzzleHttp\Promise\TaskQueue->run(true)
#13 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\promises\src\Promise.php(224): GuzzleHttp\Promise\Promise->invokeWaitFn()
#14 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\promises\src\Promise.php(269): GuzzleHttp\Promise\Promise->waitIfPending()
#15 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\promises\src\Promise.php(226): GuzzleHttp\Promise\Promise->invokeWaitList()
#16 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\promises\src\Promise.php(62): GuzzleHttp\Promise\Promise->waitIfPending()
#17 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Client.php(182): GuzzleHttp\Promise\Promise->wait()
#18 C:\wamp64\www\ojs3\lib\pkp\classes\xml\PKPXMLParser.inc.php(113): GuzzleHttp\Client->request(‘GET’, ‘http://pkp.sfu…’)
#19 C:\wamp64\www\ojs3\lib\pkp\classes\xml\PKPXMLParser.inc.php(199): PKPXMLParser->_getStream(‘http://pkp.sfu…’)
#20 C:\wamp64\www\ojs3\lib\pkp\classes\db\XMLDAO.inc.php(52): PKPXMLParser->parseStruct(‘http://pkp.sfu…’, Array)
#21 C:\wamp64\www\ojs3\lib\pkp\classes\site\VersionCheck.inc.php(76): XMLDAO->parseStruct(‘http://pkp.sfu…’, Array)
#22 C:\wamp64\www\ojs3\lib\pkp\classes\site\VersionCheck.inc.php(44): VersionCheck::parseVersionXML(‘http://pkp.sfu…’)
#23 C:\wamp64\www\ojs3\lib\pkp\classes\site\VersionCheck.inc.php(175): VersionCheck::getLatestVersion()
#24 C:\wamp64\www\ojs3\lib\pkp\pages\admin\AdminHandler.inc.php(98): VersionCheck::checkIfNewVersionExists()
#25 C:\wamp64\www\ojs3\lib\pkp\classes\core\PKPRouter.inc.php(392): AdminHandler->initialize(Object(Request), Array)
#26 C:\wamp64\www\ojs3\lib\pkp\classes\core\PKPPageRouter.inc.php(246): PKPRouter->_authorizeInitializeAndCallRequest(Array, Object(Request), Array, false)
#27 C:\wamp64\www\ojs3\lib\pkp\classes\core\Dispatcher.inc.php(144): PKPPageRouter->route(Object(Request))
#28 C:\wamp64\www\ojs3\lib\pkp\classes\core\PKPApplication.inc.php(362): Dispatcher->dispatch(Object(Request))
#29 C:\wamp64\www\ojs3\index.php(68): PKPApplication->execute()
#30 {main}
thrown in C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php on line 201
[13-Mar-2023 08:52:51 UTC] PHP Fatal error: Uncaught GuzzleHttp\Exception\ConnectException: cURL error 28: Failed to connect to pkp.sfu.ca port 80: Timed out (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) in C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php:200
Stack trace:
#0 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php(155): GuzzleHttp\Handler\CurlFactory::createRejection(Object(GuzzleHttp\Handler\EasyHandle), Array)
#1 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php(105): GuzzleHttp\Handler\CurlFactory::finishError(Object(GuzzleHttp\Handler\CurlHandler), Object(GuzzleHttp\Handler\EasyHandle), Object(GuzzleHttp\Handler\CurlFactory))
#2 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlHandler.php(43): GuzzleHttp\Handler\CurlFactory::finish(Object(GuzzleHttp\Handler\CurlHandler), Object(GuzzleHttp\Handler\EasyHandle), Object(GuzzleHttp\Handler\CurlFactory))
#3 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\Proxy.php(28): GuzzleHttp\Handler\CurlHandler->__invoke(Object(GuzzleHttp\Psr7\Request), Array)
#4 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\Proxy.php(51): GuzzleHttp\Handler\Proxy::GuzzleHttp\Handler{closure}(Object(GuzzleHttp\Psr7\Request), Array)
#5 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\PrepareBodyMiddleware.php(37): GuzzleHttp\Handler\Proxy::GuzzleHttp\Handler{closure}(Object(GuzzleHttp\Psr7\Request), Array)
#6 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Middleware.php(29): GuzzleHttp\PrepareBodyMiddleware->__invoke(Object(GuzzleHttp\Psr7\Request), Array)
#7 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\RedirectMiddleware.php(70): GuzzleHttp\Middleware::GuzzleHttp{closure}(Object(GuzzleHttp\Psr7\Request), Array)
#8 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Middleware.php(59): GuzzleHttp\RedirectMiddleware->__invoke(Object(GuzzleHttp\Psr7\Request), Array)
#9 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\HandlerStack.php(71): GuzzleHttp\Middleware::GuzzleHttp{closure}(Object(GuzzleHttp\Psr7\Request), Array)
#10 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Client.php(351): GuzzleHttp\HandlerStack->__invoke(Object(GuzzleHttp\Psr7\Request), Array)
#11 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Client.php(162): GuzzleHttp\Client->transfer(Object(GuzzleHttp\Psr7\Request), Array)
#12 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Client.php(182): GuzzleHttp\Client->requestAsync(‘GET’, Object(GuzzleHttp\Psr7\Uri), Array)
#13 C:\wamp64\www\ojs3\lib\pkp\classes\xml\PKPXMLParser.inc.php(113): GuzzleHttp\Client->request(‘GET’, ‘http://pkp.sfu…’)
#14 C:\wamp64\www\ojs3\lib\pkp\classes\xml\PKPXMLParser.inc.php(199): PKPXMLParser->_getStream(‘http://pkp.sfu…’)
#15 C:\wamp64\www\ojs3\lib\pkp\classes\db\XMLDAO.inc.php(52): PKPXMLParser->parseStruct(‘http://pkp.sfu…’, Array)
#16 C:\wamp64\www\ojs3\lib\pkp\classes\site\VersionCheck.inc.php(76): XMLDAO->parseStruct(‘http://pkp.sfu…’, Array)
#17 C:\wamp64\www\ojs3\lib\pkp\classes\site\VersionCheck.inc.php(44): VersionCheck::parseVersionXML(‘http://pkp.sfu…’)
#18 C:\wamp64\www\ojs3\lib\pkp\classes\site\VersionCheck.inc.php(175): VersionCheck::getLatestVersion()
#19 C:\wamp64\www\ojs3\lib\pkp\pages\admin\AdminHandler.inc.php(98): VersionCheck::checkIfNewVersionExists()
#20 C:\wamp64\www\ojs3\lib\pkp\classes\core\PKPRouter.inc.php(392): AdminHandler->initialize(Object(Request), Array)
#21 C:\wamp64\www\ojs3\lib\pkp\classes\core\PKPPageRouter.inc.php(246): PKPRouter->_authorizeInitializeAndCallRequest(Array, Object(Request), Array, false)
#22 C:\wamp64\www\ojs3\lib\pkp\classes\core\Dispatcher.inc.php(144): PKPPageRouter->route(Object(Request))
#23 C:\wamp64\www\ojs3\lib\pkp\classes\core\PKPApplication.inc.php(362): Dispatcher->dispatch(Object(Request))
#24 C:\wamp64\www\ojs3\index.php(68): PKPApplication->execute()
#25 {main}
thrown in C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php on line 200
[13-Mar-2023 08:52:57 UTC] PHP Fatal error: Uncaught GuzzleHttp\Exception\ConnectException: cURL error 28: Failed to connect to pkp.sfu.ca port 80: Timed out (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) in C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php:200
Stack trace:
#0 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php(155): GuzzleHttp\Handler\CurlFactory::createRejection(Object(GuzzleHttp\Handler\EasyHandle), Array)
#1 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php(105): GuzzleHttp\Handler\CurlFactory::finishError(Object(GuzzleHttp\Handler\CurlHandler), Object(GuzzleHttp\Handler\EasyHandle), Object(GuzzleHttp\Handler\CurlFactory))
#2 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlHandler.php(43): GuzzleHttp\Handler\CurlFactory::finish(Object(GuzzleHttp\Handler\CurlHandler), Object(GuzzleHttp\Handler\EasyHandle), Object(GuzzleHttp\Handler\CurlFactory))
#3 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\Proxy.php(28): GuzzleHttp\Handler\CurlHandler->__invoke(Object(GuzzleHttp\Psr7\Request), Array)
#4 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\Proxy.php(51): GuzzleHttp\Handler\Proxy::GuzzleHttp\Handler{closure}(Object(GuzzleHttp\Psr7\Request), Array)
#5 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\PrepareBodyMiddleware.php(37): GuzzleHttp\Handler\Proxy::GuzzleHttp\Handler{closure}(Object(GuzzleHttp\Psr7\Request), Array)
#6 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Middleware.php(29): GuzzleHttp\PrepareBodyMiddleware->__invoke(Object(GuzzleHttp\Psr7\Request), Array)
#7 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\RedirectMiddleware.php(70): GuzzleHttp\Middleware::GuzzleHttp{closure}(Object(GuzzleHttp\Psr7\Request), Array)
#8 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Middleware.php(59): GuzzleHttp\RedirectMiddleware->__invoke(Object(GuzzleHttp\Psr7\Request), Array)
#9 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\HandlerStack.php(71): GuzzleHttp\Middleware::GuzzleHttp{closure}(Object(GuzzleHttp\Psr7\Request), Array)
#10 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Client.php(351): GuzzleHttp\HandlerStack->__invoke(Object(GuzzleHttp\Psr7\Request), Array)
#11 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Client.php(162): GuzzleHttp\Client->transfer(Object(GuzzleHttp\Psr7\Request), Array)
#12 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Client.php(182): GuzzleHttp\Client->requestAsync(‘GET’, Object(GuzzleHttp\Psr7\Uri), Array)
#13 C:\wamp64\www\ojs3\lib\pkp\classes\xml\PKPXMLParser.inc.php(113): GuzzleHttp\Client->request(‘GET’, ‘http://pkp.sfu…’)
#14 C:\wamp64\www\ojs3\lib\pkp\classes\xml\PKPXMLParser.inc.php(199): PKPXMLParser->_getStream(‘http://pkp.sfu…’)
#15 C:\wamp64\www\ojs3\lib\pkp\classes\db\XMLDAO.inc.php(52): PKPXMLParser->parseStruct(‘http://pkp.sfu…’, Array)
#16 C:\wamp64\www\ojs3\lib\pkp\classes\site\VersionCheck.inc.php(76): XMLDAO->parseStruct(‘http://pkp.sfu…’, Array)
#17 C:\wamp64\www\ojs3\lib\pkp\classes\site\VersionCheck.inc.php(44): VersionCheck::parseVersionXML(‘http://pkp.sfu…’)
#18 C:\wamp64\www\ojs3\lib\pkp\classes\site\VersionCheck.inc.php(175): VersionCheck::getLatestVersion()
#19 C:\wamp64\www\ojs3\lib\pkp\pages\admin\AdminHandler.inc.php(98): VersionCheck::checkIfNewVersionExists()
#20 C:\wamp64\www\ojs3\lib\pkp\classes\core\PKPRouter.inc.php(392): AdminHandler->initialize(Object(Request), Array)
#21 C:\wamp64\www\ojs3\lib\pkp\classes\core\PKPPageRouter.inc.php(246): PKPRouter->_authorizeInitializeAndCallRequest(Array, Object(Request), Array, false)
#22 C:\wamp64\www\ojs3\lib\pkp\classes\core\Dispatcher.inc.php(144): PKPPageRouter->route(Object(Request))
#23 C:\wamp64\www\ojs3\lib\pkp\classes\core\PKPApplication.inc.php(362): Dispatcher->dispatch(Object(Request))
#24 C:\wamp64\www\ojs3\index.php(68): PKPApplication->execute()
#25 {main}
thrown in C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php on line 200
[13-Mar-2023 09:00:57 UTC] PHP Fatal error: Uncaught GuzzleHttp\Exception\RequestException: cURL error 60: SSL certificate problem: unable to get local issuer certificate (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) in C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php:201
Stack trace:
#0 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php(155): GuzzleHttp\Handler\CurlFactory::createRejection(Object(GuzzleHttp\Handler\EasyHandle), Array)
#1 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php(105): GuzzleHttp\Handler\CurlFactory::finishError(Object(GuzzleHttp\Handler\CurlHandler), Object(GuzzleHttp\Handler\EasyHandle), Object(GuzzleHttp\Handler\CurlFactory))
#2 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlHandler.php(43): GuzzleHttp\Handler\CurlFactory::finish(Object(GuzzleHttp\Handler\CurlHandler), Object(GuzzleHttp\Handler\EasyHandle), Object(GuzzleHttp\Handler\CurlFactory))
#3 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\Proxy.php(28): GuzzleHttp\Handler\CurlHandler->__invoke(Object(GuzzleHttp\Psr7\Request), Array)
#4 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\Proxy.php(51): GuzzleHttp\Handler\Proxy::GuzzleHttp\Handler{closure}(Object(GuzzleHttp\Psr7\Request), Array)
#5 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\PrepareBodyMiddleware.php(37): GuzzleHttp\Handler\Proxy::GuzzleHttp\Handler{closure}(Object(GuzzleHttp\Psr7\Request), Array)
#6 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Middleware.php(29): GuzzleHttp\PrepareBodyMiddleware->__invoke(Object(GuzzleHttp\Psr7\Request), Array)
#7 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\RedirectMiddleware.php(70): GuzzleHttp\Middleware::GuzzleHttp{closure}(Object(GuzzleHttp\Psr7\Request), Array)
#8 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\RedirectMiddleware.php(107): GuzzleHttp\RedirectMiddleware->__invoke(Object(GuzzleHttp\Psr7\Request), Array)
#9 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\RedirectMiddleware.php(72): GuzzleHttp\RedirectMiddleware->checkRedirect(Object(GuzzleHttp\Psr7\Request), Array, Object(GuzzleHttp\Psr7\Response))
#10 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\promises\src\FulfilledPromise.php(41): GuzzleHttp\RedirectMiddleware->GuzzleHttp{closure}(Object(GuzzleHttp\Psr7\Response))
#11 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\promises\src\TaskQueue.php(48): GuzzleHttp\Promise\FulfilledPromise::GuzzleHttp\Promise{closure}()
#12 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\promises\src\Promise.php(248): GuzzleHttp\Promise\TaskQueue->run(true)
#13 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\promises\src\Promise.php(224): GuzzleHttp\Promise\Promise->invokeWaitFn()
#14 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\promises\src\Promise.php(269): GuzzleHttp\Promise\Promise->waitIfPending()
#15 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\promises\src\Promise.php(226): GuzzleHttp\Promise\Promise->invokeWaitList()
#16 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\promises\src\Promise.php(62): GuzzleHttp\Promise\Promise->waitIfPending()
#17 C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Client.php(182): GuzzleHttp\Promise\Promise->wait()
#18 C:\wamp64\www\ojs3\lib\pkp\classes\xml\PKPXMLParser.inc.php(113): GuzzleHttp\Client->request(‘GET’, ‘http://pkp.sfu…’)
#19 C:\wamp64\www\ojs3\lib\pkp\classes\xml\PKPXMLParser.inc.php(199): PKPXMLParser->_getStream(‘http://pkp.sfu…’)
#20 C:\wamp64\www\ojs3\lib\pkp\classes\db\XMLDAO.inc.php(52): PKPXMLParser->parseStruct(‘http://pkp.sfu…’, Array)
#21 C:\wamp64\www\ojs3\lib\pkp\classes\site\VersionCheck.inc.php(76): XMLDAO->parseStruct(‘http://pkp.sfu…’, Array)
#22 C:\wamp64\www\ojs3\lib\pkp\classes\site\VersionCheck.inc.php(44): VersionCheck::parseVersionXML(‘http://pkp.sfu…’)
#23 C:\wamp64\www\ojs3\lib\pkp\classes\site\VersionCheck.inc.php(175): VersionCheck::getLatestVersion()
#24 C:\wamp64\www\ojs3\lib\pkp\pages\admin\AdminHandler.inc.php(98): VersionCheck::checkIfNewVersionExists()
#25 C:\wamp64\www\ojs3\lib\pkp\classes\core\PKPRouter.inc.php(392): AdminHandler->initialize(Object(Request), Array)
#26 C:\wamp64\www\ojs3\lib\pkp\classes\core\PKPPageRouter.inc.php(246): PKPRouter->_authorizeInitializeAndCallRequest(Array, Object(Request), Array, false)
#27 C:\wamp64\www\ojs3\lib\pkp\classes\core\Dispatcher.inc.php(144): PKPPageRouter->route(Object(Request))
#28 C:\wamp64\www\ojs3\lib\pkp\classes\core\PKPApplication.inc.php(362): Dispatcher->dispatch(Object(Request))
#29 C:\wamp64\www\ojs3\index.php(68): PKPApplication->execute()
#30 {main}
thrown in C:\wamp64\www\ojs3\lib\pkp\lib\vendor\guzzlehttp\guzzle\src\Handler\CurlFactory.php on line 201