For the last week or so, I have random refresh errors - usually something along the lines of "Unknown Exception". Similar issue refreshing in service or refreshing on desktop. have uninstalled / r...
Check if the credentails are valid and if there's some permissions like "read" are not allowed on MS access side. You can also doc below to troubleshoot this issue.
https://docs.microsoft.com/en-us/power-bi/refresh-troubleshooting-refresh-scenarios
Regards,
Jimmy Tao