Hi PPP2620,
Cheers for the thorough rundown! This definitely looks like a repeatable MYOB document upload issue throwing the Network request failed error. You’ve covered all the bases with two logins, both upload methods, Chrome and Edge on a solid connection, plus reboots that’s a solid effort. As per checking there’s no current issue reported when uploading. Since the error still persist, best to give our live chat team a buzz via our virtual assistant MOCA, or by submitting a support case via MyAccount. They can dive deeper into this and help you resolve the issue.
Cheers,
Shella