Some where around May 13th, all of our datasets that connect to SharePoint O365 started failing with the following message: Unable to connect to the data source undefined. (Details below). On May 16th we upgraded our gateway to the latest May 2021 gateway which was version 3000.82.2 (Maybe .4) and everything worked for a couple of days. Then on the 19th we noticed it was failing again. We noticed that the gateway download for May 2021 had a new release and was now at version 3000.82.6. So we downloaded and installed and it seemd to resolve the issue. However, we are still seeing it fail. This morning it failed, so then I was able to manually refresh and it worked, however, it just failed again for the scheduled refresh and a manual refresh is also not working. Ideas? Thoughts? What's going on? Not sure what to do.
Underlying error code:
Underlying error message:
SharePoint: Request failed: The underlying connection was closed: An unexpected error occurred on a send.