The credentials provided for the SharePoint source are invalid

I have connected a pbi desktop report to a sharepoint online lists data source. All credentials works fine when I have the desktop open and refresh the data. But when I publish the report in Power-bi service (on the webpage), my credentials doesnt work so I cant put in a refresh schedule. All I get is this error below. I have tried to delete and re-enter credentials, republish with a few tweeks to the URL but nothing seems to work. Ideas are welcomed!