Amazon S3 Media Source only works without region set (almost)

My Amazon S3 bucket only connects without region (us-east-1) set for some reason. And even then when browsing my bucket files (images) in MoreGallery, image thumbs cannot be loaded and files cannot be imported (no errors given, the dialogue just closes). My imageExtensions settings have not been changed and all other settings are correct. Please help, I can’t afford to get stuck on this issue. Thanks for any insight at all… Ugh!

Did you find a resolution for this? I’m struggling to connect an S3 bucket in eu-west-2 with credentials that work in Filezilla Pro.

maybe you could try https://github.com/modxcms/aws-s3-media-source