S3 Compatible v4 Connecter Needs Fixing So it looks like it will make the connection. It isn't until it tries to use a bucket or object for that matter that it tries to either not use a region or use one named by default on the backend of the API.
Here is what CloudBerry Explorer gives me. Please note its the same for an MSP360 Backup Service.
And then watching the back end of my systems with all the header information here is what I get as well. Notice how it says its expecting the region to be us-west-1 towards the bottoms. (Private Information has been redacted).
What do you guys think?