CWP7 Roundcube Server Error After Update - Mailbox Empty But Sending Works

Hello everyone,I recently faced an issue on a CWP7 server where webmail login was working, sending mail was also working, but the mailbox/inbox was not loading.Roundcube was showing a red error message:The strange part was that the mailbox looked empty, but the emails were not actually missing. The problem was that Roundcube crashed while trying to render the email list.After checking the Roundcube error log:I found this fatal error:The issue happened after a CWP Roundcube update. The Roundcube files were updated, but the internal CWP PHP did not have the required PHP intl extension enabled, so the PHP class Spoofchecker was missing.Important note:The server websites were using PHP 7.4 normally, and PHP 7.4 had intl enabled. But Roundcube inside CWP was using CWP's own internal PHP:Even though the folder says php71, on this server it was actually PHP 7.2.30, and it was missing intl.I confirmed it with:The result showed:So the normal system PHP was fine. The issue was only with the internal CWP PHP used by Roundcube.The package for CWP PHP intl was not available on this server, so I applied this safe workaround to prevent Roundcube from crashing:This adds a small check inside the Roundcube spoof checker file:After restarting cwpsrv, Roundcube started working normally again. The inbox appeared again and the server error disappeared.To verify that the patch exists:If the command returns a line containing class_exists, the patch is active.Important:This is a workaround, not the perfect long-term fix. The best fix would be to install/enable PHP intl for the internal CWP PHP used by Roundcube. But if the required CWP package is not available, this workaround prevents Roundcube from crashing.Also note that this file may be overwritten by a future CWP/Roundcube update. After future updates, check again with:If the patch is missing and the same Roundcube error returns, reapply the fix.I also recommend checking the Roundcube temp folder for suspicious PHP files, especially if you see exploit attempts in CWP logs:In my case, the mailbox was not lost. It was only a Roundcube display/listing crash caused by a missing PHP Spoofchecker class after a CWP Roundcube update.