Dataflow refreshes fail, though I see data in "dataflow edit" mode.

Hi ArtOfBI ,

If the error message truly is just those two lines, not other text or codes you will have to contact Microsoft support and give those numbers to them.  The Activity and Request ID's are something that they have access to and that are particular to your specific attempt.  Go here https://powerbi.microsoft.com/en-us/support/ and go to "support"