Problem with OAuth2 when refreshing data - Connection with Excel on my Sharepoint online

I have an excel file in the documents of a SharePoint site. I connected my excel in my Power BI file in the desktop version with the web connector and then I published it on Power BI online. When I try to refresh data the OAuth2 credentials fail and I have to introduce again my user and pass in the credential section. Any other type of autentication is not supported I think. Is there any solution that allows me to refresh data on my Power BI online without errors?

Image of the problem