Power BI Dataflow - Error at refresh

Hello!

Thanks for your reply. 
Unfortunately this also didnt solve the problem. 

We made sure that everything is set up properly as described and found out the following:

Only one of our two nodes causes the problem. If we activate the "good" node all is working finde and refreshes can be done without any issue.

If we activate only the failure node, everything crashes.

We searched a lot but weren't able to find any difference in the failing node compared to the working node, unfortunately.

I think the only possibility could be a re-install.

Thanks for any input.

Best wishes,

Johann