Issue Roundcube HTTP ERROR 500

[remcostraaten]

Server operating system version

Cloudlinux

Plesk version and microupdate number

18.0.53

Dear,

I just received this problem in my Roundcube error log. I tried everything but still not working:
[16-Jun-2023 08:11:33 UTC] PHP Fatal error: Undefined class constant 'MYSQL_ATTR_FOUND_ROWS' in /usr/share/psa-roundcube/program/lib/Roundcube/db/mysql.php on line 149

Can somebody help me?

 

[Peter Debik]

Did you disable the mysqlnd or mysql extension in CloudLinux PHP? In that case, reenable it, please. Another solution approach can be to reinstall the Webmail component from Plesk installer (uninstall, then reinstall). In general, the issue is most likely caused by an issue with the MySQL extension or PHP on the server. If the suggestions do not lead to success, please open a ticket with Plesk support so that staff can check and fix the issue on your server.

 

[Martin Dias]

Additional question, are you using Litespeed web server?
If yes, this 2 commands may help:

mv /usr/local/bin/lsphp /usr/local/bin/lsphp-bk
ln -s /opt/plesk/php/7.3/bin/lsphp /usr/local/bin/lsphp

See Troubleshooting LiteSpeed Web Server with Plesk | LiteSpeed Documentation for reference