Roundcube1.5.x Internal Server Error - FIX

I'm totally new to this. What do I need to do to run that command?
Thanks

Connect via SSH to your server as a root. Then run these commands.

Simple fix is this

Code: [Select]

sh /scripts/mail_roundcube_update

Thank You for the fix .Do we have to remove it or not...?

When the error occurred I went down to 1.4.11 with the command

Code: [Select]

/scripts/update_cwp
/scripts/mail_roundcube_update
now how can I go up to 1.5 again?

Roundcube seems to have lots of bugs.  Is there a better alternative to web based email.   A while back, I think CWP also offered squirrelMail.

Right now when I access roundcube, it says I have 500 messages in inbox, but I can't see any of them.  My other boxes list messages. 

I had serious email problems with inbox folders missing on some accounts.   I upgraded mariadb to 10.2 and now everything is good.   Also,,,,,,,I unchecked keep mail on my computer on my imap settings.   Not sure which one fixed the problem but all is good now.