OJS: 3.3.08: Impossible to add reviewers

Software Support
1

Hi all,
working on an istance with OJS 3.3.0.8 I found this problem:

Can’t add reviewers on a submission in the admin area, once I’m going to write the reviewers name the auto completing function starts and releases a bunch of errors 500

So looking at the apache log I can see:

AH01071: Got error 'PHP message: PHP Fatal error:  Uncaught RuntimeException: Unexpected data in output buffer. Maybe you have characters before an opening <?php tag? in /data-ojs-myojs/documentRoot/www-ojs-myinstance/lib/pkp/lib/vendor/slim/slim/Slim/App.php:621
Stack trace:
#0 /data-ojs-myojs/documentRoot/www-ojs-myinstance/lib/pkp/lib/vendor/slim/slim/Slim/App.php(317): Slim\\App->finalize(Object(APIResponse))
#1 /data-ojs-myojs/documentRoot/www-ojs-myinstance/lib/pkp/classes/core/APIRouter.inc.php(115): Slim\\App->run()
#2 /data-ojs-myojs/documentRoot/www-ojs-myinstance/lib/pkp/classes/core/Dispatcher.inc.php(144): APIRouter->route(Object(Request))
#3 /data-ojs-myojs/documentRoot/www-ojs-myinstance/lib/pkp/classes/core/PKPApplication.inc.php(362): Dispatcher->dispatch(Object(Request))
#4 /data-ojs-myojs/documentRoot/www-ojs-myinstance/index.php(68): PKPApplication->execute()
#5 {main}
  thrown in /data-ojs-myojs/documentRoot/www-ojs-myinstance/lib/pkp/lib/vendor/slim/slim/Slim/App.php on line 621', referer: https://www.ojsjournal.org/workflow/index/4864/3

I checked and there is no error in the php file.

How to solve this?

Thanks
Alfredo

2

Hi @Alfredo_Cosco,

This won’t necessarily be anything in the PHP files mentioned in the error log – it could be anywhere in the system. I’d suggest using a tool like diff to compare your production OJS source against the distribution from the same version. (If that doesn’t identify any modifications, then also check your plugins.)

Regards,
Alec Smecher
Public Knowledge Project Team