When publishing a PowerBI report, sometimes it fails out and you'll get a weird exception:
microsoft.powerbi.client.windows.services.powerbiwebexception
I spent far too long trying to find the answer, no records exist on how to fix this as of writing this post. Answer provided below.
From my observations, there seems to be a limit near 200~ reports per account. Note this is not data size ( storage ) we're talking about, but the volume ( count ) of reports.
I don't know if additional app-workspaces affect the total number that causes the exception.
The solution is to delete some reports in your PBI service environment.