Filr 3.4.7 Error Message: (kablink) Could not add document to the index

Hi all

Since a few days i have this message if i want to upload files via webinterface to the filr.

I'm also not able to re-create the index.

I found this error only with filr 4, but not with filr 3.


How i can delete the index and recreate it from the filr console?