While I will check with the API provider which triggers their internal error. I just if there is any difference in terms of the request and header. Seems the cloud version has much more keys in the header compared to self-hosted.
In fact the cloud workflows works as of yesterday, just wonder if there is any recent upgrade to retool cloud.
[Update] I haven't found similar customer reports yet, but we updated Cloud on February 9th at ~2:15 pm PT. Does that timeline line up with the behavior change you noticed?
Did you find out anything from the API provider? I am also seeing error logs for your workflow related to login identity
If you can test the same query in an app, it might help us narrow down whether there is a workflows specific issue at play