What is the git -remote-http 128 error code. This happened when I tried to submit a repo request requiring authentication (it never asked for a password.) Is there any central place to find out what the error codes mean
If you are talking about a command return code, it means that the key has been revoked.
You can find existing codes here, for example: http://mazack.org/unix/errno.php
perhaps because your SSH key has been compromised. Create a new one and add it to your GitHub account.