Error: could not write photo for analysis

Hello,
after installing the new version 2.2., I can´t use NLP any more the following incomplete message pops up:

Error: could not write photo for analysis
Plugin folder: C:\Program Files\NegativelabPro\NegativelabPro.Irplugin
If the problem persists, it may be a folder permission …
There the window ends and I can`t read the rest.

What can I do`?
I am using Windows 10 and Lightroom CC
Thanks a lot,
Gerhard