Filter error when apply on inbox

Hi,

I successfully import filter rules from zimbra to carbonio.

But when I try to run filter directly from Mails Settings / Filters and choose Inbox as folder to apply filter I get Error:

" An error coourred while applying the filter 'Name of Filter' "

What is the problem or how to diagnose this error. This happens on all filters, ones that are imported or that was created in Carbonio.

Best Regards, Marko