Roundcube request check failed

Hi
Getting an error when trying to login to a roundcube mailbox.
is there a quick way to clear this, think i remember clearing cache some where but cannot remember as not seen this in a while.

Hello–

That is not an error I’ve ever seen, before. Please submit a ticket.

Thanks,
-Jenna

sorry for late reply.
This error was shown for just one user, not sure it was the correct way but cleared the Roundcube session and all working as normal again.