The bucket you are attempting to access must be addressed using the specified endpoint. Please send all future requests to this endpoint. Not sure whats going on here. I think we're using the correct endpoint but the bucket names differ. The move to the new account will fix this issue.
As it turns out, we never actually changed Discourse to use the bucket on the mofo account, and the mofodev account is actually the mozilla-labs account which we already had access to. When it went down initially I changed the setting to match the details for the mofo account bucket, not knowing it was still using the mozilla-labs account. Directed by M. Night Shyamalan.