I've been attempting to push a mod, on different attempts get these two errors

BACKEND   (E): [RestApi] ID:[15] Error Code:500 - Internal Server Error, ApiCode:
DEFAULT   (E): Uploading failed! Reason: ""
RESOURCES (E): Publishing failed

However when trying to publish that version again it says I can't because 'version is already uploaded' - however this does not appear on the Workshop.