We publish one issue per year. Last year everything is working fine, and now (after the latest upgrade) I get an error when I want to schedule for publication articles. I get the following error: An unexpected error occurred. You may have been logged out. Please reload the page and try again.
PHP version is 7.2, so it is okay, all the details are inserted correctly.
The eror log says (it’s just a part of it):
[Thu Dec 24 02:12:04 2020] [error] [client 79.140.150.165] #59 /home/zwfmqpxw/public_html/helenskestudije.me/ojs/index.php(68): PKPApplication->execute(), referer: https://helenskestudije.me/ojs/index.php/jhs/workflow/index/49/5
[Thu Dec 24 02:12:04 2020] [error] [client 79.140.150.165] #58 /home/zwfmqpxw/public_html/helenskestudije.me/ojs/lib/pkp/classes/core/PKPApplication.inc.php(281): Dispatcher->dispatch(Object(Request)), referer: https://helenskestudije.me/ojs/index.php/jhs/workflow/index/49/5
[Thu Dec 24 02:12:04 2020] [error] [client 79.140.150.165] #57 /home/zwfmqpxw/public_html/helenskestudije.me/ojs/lib/pkp/classes/core/Dispatcher.inc.php(143): APIRouter->route(Object(Request)), referer: https://helenskestudije.me/ojs/index.php/jhs/workflow/index/49/5
[Thu Dec 24 02:12:04 2020] [error] [client 79.140.150.165] #56 /home/zwfmqpxw/public_html/helenskestudije.me/ojs/lib/pkp/classes/core/APIRouter.inc.php(115): Slim\App->run(), referer: https://helenskestudije.me/ojs/index.php/jhs/workflow/index/49/5
[Thu Dec 24 02:12:04 2020] [error] [client 79.140.150.165] #55 /home/zwfmqpxw/public_html/helenskestudije.me/ojs/lib/pkp/lib/vendor/slim/slim/Slim/App.php(297): Slim\App->process(Object(Slim\Http\Request), Object(APIResponse)), referer: https://helenskestudije.me/ojs/index.php/jhs/workflow/index/49/5
[Thu Dec 24 02:12:04 2020] [error] [client 79.140.150.165] #54 /home/zwfmqpxw/public_html/helenskestudije.me/ojs/lib/pkp/lib/vendor/slim/slim/Slim/App.php(392): Slim\App->callMiddlewareStack(Object(Slim\Http\Request), Object(APIResponse)), referer: https://helenskestudije.me/ojs/index.php/jhs/workflow/index/49/5
[Thu Dec 24 02:12:04 2020] [error] [client 79.140.150.165] #53 /home/zwfmqpxw/public_html/helenskestudije.me/ojs/lib/pkp/lib/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(117): Slim\App->Slim\{closure}(Object(Slim\Http\Request), Object(APIResponse)), referer: https://helenskestudije.me/ojs/index.php/jhs/workflow/index/49/5
[Thu Dec 24 02:12:04 2020] [error] [client 79.140.150.165] #52 /home/zwfmqpxw/public_html/helenskestudije.me/ojs/lib/pkp/lib/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(70): call_user_func(Object(Slim\DeferredCallable), Object(Slim\Http\Request), Object(APIResponse), Object(Closure)), referer: https://helenskestudije.me/ojs/index.php/jhs/workflow/index/49/5
[Thu Dec 24 02:12:04 2020] [error] [client 79.140.150.165] #50 /home/zwfmqpxw/public_html/helenskestudije.me/ojs/lib/pkp/lib/vendor/slim/slim/Slim/DeferredCallable.php(57): call_user_func_array(Object(Closure), Array), referer: https://helenskestudije.me/ojs/index.php/jhs/workflow/index/49/5
[Thu Dec 24 02:12:04 2020] [error] [client 79.140.150.165] #48 /home/zwfmqpxw/public_html/helenskestudije.me/ojs/lib/pkp/classes/handler/APIHandler.inc.php(132): Slim\App->Slim\{closure}(Object(Slim\Http\Request), Object(APIResponse)), referer: https://helenskestudije.me/ojs/index.php/jhs/workflow/index/49/5
[Thu Dec 24 02:12:04 2020] [error] [client 79.140.150.165] #47 /home/zwfmqpxw/public_html/helenskestudije.me/ojs/lib/pkp/lib/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(70): call_user_func(Object(Slim\DeferredCallable), Object(Slim\Http\Request), Object(APIResponse), Object(Closure)), referer: https://helenskestudije.me/ojs/index.php/jhs/workflow/index/49/5
[Thu Dec 24 02:12:04 2020] [error] [client 79.140.150.165] #45 /home/zwfmqpxw/public_html/helenskestudije.me/ojs/lib/pkp/lib/vendor/slim/slim/Slim/DeferredCallable.php(57): call_user_func_array(Object(Closure), Array), referer: https://helenskestudije.me/ojs/index.php/jhs/workflow/index/49/5
[Thu Dec 24 02:12:04 2020] [error] [client 79.140.150.165] #43 /home/zwfmqpxw/public_html/helenskestudije.me/ojs/lib/pkp/classes/handler/APIHandler.inc.php(124): Slim\App->process(Object(Slim\Http\Request), Object(APIResponse)), referer: https://helenskestudije.me/ojs/index.php/jhs/workflow/index/49/5