@alexey is this resolved? I’m having the same issue recurring. I thought it might be because I was bundling a bunch of dependencies and the upload was just timing out - but after removing dependencies from the bundle in favor of deferring that installation to AWS CodeDeploy - I’m still seeing this error.
EDIT: Also, I see this is an old discussion, so I can open a new thread if necessary.
EDIT 2: Figured it out! Okay, so for anyone else seeing this - this could be caused by any number of things. For me, it was a small typo in my CircleCI user’s IAM policy. I’d definitely suggest looking there first.