DataSource.Error: <ccon>Web.Contents failed to get contents from Sharepoint

Good morning, 

So, this is what appears about the gateway:

About refresh on the desktop, already did all the steps, and only refreshes when it's query by query, if i try to refresh all, it fails, saying cannot connect to the sharepoint. 


This happend in May this year, i published about it, dind get any solutions, other users had the same issue, and it stated working again on his own.