This is an OJS 2.4.8 installation upgraded to OJS 188.8.131.52 early this year. Almost everything works as intended but we are facing a problem when trying to add a reviewer to a submission.
Whenever we try to “Add a reviewer” we get an error stating “Failed AJAX request or invalid JSON returned”
with a corresponding error in the Apache logs:
Malformed UTF-8 characters, possibly incorrectly encoded, referer: http://siteURL/ojs/index.php/journalname/workflow/index/1674/3
[i18n] Settings in config.inc.php are identical to the ones present in the original version and so are the charset configurations in both the databases.
We started checking the database to find any malformed character that might be producing the error, but at the same time, we discovered that the error only gets triggered when it is the First Review Round. If we add a second Review Round and try to add a reviewer, there is no error and the list of available reviewers is displayed.
Any tip on this situation will be very welcome
Thanks in advance.