Hi, I've been having the exact same issue as the person on this ticket : https://powerusers.microsoft.com/t5/Building-Flows/Could-not-retrieve-values-The-dynamic-invocation-request-failed/m-p/1499390.
Except that it has been going on for more than 2 days now and doesn't seem to work again, i tried solving it and deleted + reconnected connectors for excel, nothing solves it for now. Excel is the only one not working, Sharepoint and Forms work just fine.
I didn't touch any settings and it just stopped working from one day to another.
Any idea of what the problem could be ?

Best regards,
Tony