I am having trouble sending attachments in the Signal app - seems unlikely, but could this be related? [edit- looks like they do have a pretty heavy reliance o

I am having trouble sending attachments in the Signal app - seems unlikely, but could this be related? [edit- looks like they do have a pretty heavy reliance on S3, per https://github.com/WhisperSystems/Signal-Server/blob/master/config/sample.yml https://github.com/WhisperSystems/Signal-Server/blob/master/... and various other sources.]