Unable to move emails to local folder after upgrading to 8.2

Hi there,
I recently upgraded my emClient version to 8.2. After that successful upgrade I can use the software as usual but i cannot move emails from my inbox to the local folder structure.

A loading screen appears with the message (translated from german): “This action will take a while to complete” then it just closes and the email is not moved to the subfolder.

Can you help me?

Best regards
Gregor Oelze