An unexpexted error on Submissions page

Software Support
1

I use OJS 3.3, when I go to the Submission page, it shows error like this:

image
image1366×768 103 KB

Error logs:
PHP Fatal error: Uncaught RuntimeException: Unexpected data in output buffer. Maybe you have characters before an opening <?php tag? in /home/grszzqwr/ejournal.akfarsurabaya.ac.id/lib/pkp/lib/vendor/slim/slim/Slim/App.php:621
Stack trace:
#0 /home/grszzqwr/ejournal.akfarsurabaya.ac.id/lib/pkp/lib/vendor/slim/slim/Slim/App.php(317): Slim\App->finalize(Object(APIResponse))
#1 /home/grszzqwr/ejournal.akfarsurabaya.ac.id/lib/pkp/classes/core/APIRouter.inc.php(109): Slim\App->run()
#2 /home/grszzqwr/ejournal.akfarsurabaya.ac.id/lib/pkp/classes/core/Dispatcher.inc.php(134): APIRouter->route(Object(Request))
#3 /home/grszzqwr/ejournal.akfarsurabaya.ac.id/lib/pkp/classes/core/PKPApplication.inc.php(252): Dispatcher->dispatch(Object(Request))
#4 /home/grszzqwr/ejournal.akfarsurabaya.ac.id/index.php(75): PKPApplication->execute()
#5 {main}
thrown in /home/grszzqwr/ejournal.akfarsurabaya.ac.id/lib/pkp/lib/vendor/slim/slim/Slim/App.php on line 621
[30-Aug-2024 06:14:43 UTC] PHP Fatal error: Uncaught RuntimeException: Unexpected data in output buffer. Maybe you have characters before an opening <?php tag? in /home/grszzqwr/ejournal.akfarsurabaya.ac.id/lib/pkp/lib/vendor/slim/slim/Slim/App.php:621
Stack trace:
#0 /home/grszzqwr/ejournal.akfarsurabaya.ac.id/lib/pkp/lib/vendor/slim/slim/Slim/App.php(317): Slim\App->finalize(Object(APIResponse))
#1 /home/grszzqwr/ejournal.akfarsurabaya.ac.id/lib/pkp/classes/core/APIRouter.inc.php(109): Slim\App->run()
#2 /home/grszzqwr/ejournal.akfarsurabaya.ac.id/lib/pkp/classes/core/Dispatcher.inc.php(134): APIRouter->route(Object(Request))
#3 /home/grszzqwr/ejournal.akfarsurabaya.ac.id/lib/pkp/classes/core/PKPApplication.inc.php(252): Dispatcher->dispatch(Object(Request))
#4 /home/grszzqwr/ejournal.akfarsurabaya.ac.id/index.php(75): PKPApplication->execute()
#5 {main}
thrown in /home/grszzqwr/ejournal.akfarsurabaya.ac.id/lib/pkp/lib/vendor/slim/slim/Slim/App.php on line 621
[30-Aug-2024 06:14:43 UTC] PHP Fatal error: Uncaught RuntimeException: Unexpected data in output buffer. Maybe you have characters before an opening <?php tag? in /home/grszzqwr/ejournal.akfarsurabaya.ac.id/lib/pkp/lib/vendor/slim/slim/Slim/App.php:621
Stack trace:
#0 /home/grszzqwr/ejournal.akfarsurabaya.ac.id/lib/pkp/lib/vendor/slim/slim/Slim/App.php(317): Slim\App->finalize(Object(APIResponse))
#1 /home/grszzqwr/ejournal.akfarsurabaya.ac.id/lib/pkp/classes/core/APIRouter.inc.php(109): Slim\App->run()
#2 /home/grszzqwr/ejournal.akfarsurabaya.ac.id/lib/pkp/classes/core/Dispatcher.inc.php(134): APIRouter->route(Object(Request))
#3 /home/grszzqwr/ejournal.akfarsurabaya.ac.id/lib/pkp/classes/core/PKPApplication.inc.php(252): Dispatcher->dispatch(Object(Request))
#4 /home/grszzqwr/ejournal.akfarsurabaya.ac.id/index.php(75): PKPApplication->execute()
#5 {main}

How is the solution to fix this?

Regards

2

Hello
In my opinion the easiest thing is to update to the latest version (3.3.0-19), if you haven’t already done so. It might solve in case of corrupted files