I tried to publish a report when I was logged with my user and the messsage "(500) Internal server error" appeared. This error does not happen when I try to publish the same .pbix file with other user. Is this problem related with my user account? This error first appered last afternoon (GMT +2).
In my case it was down to some type of file corruption. I managed to fix by exporting it as a PowerBI template (file menu - export) and then reimporting it again which puts it into a blank pbix file. It then was able to re-publish successfully.