Hello,
Woke up this morning with data refresh disabled.
Some of the the Dataset's Data Source Credentials failed to sign in.
For some of the disabled ones, I could just choose oAuth2 and sign it using my credentials. For some others, I could not. It would yield and error if trying to use my oAuth2 credentials.
For these later ones, I needed to leave the Data Source Credentials list - by clicking on the top left, say, "Dashboard", and then ckicking back on "Datasets". I could then use the oAuth2 credentials and restore the link.
It fixed it. But, does this make sense to you?