Hello @will2asher,

According to others that have experienced the same issue, it looks like the branch ‘master’ is clashing since there’s already a ‘master’ branch, however I could be wrong. @shiftkey explains the issue here. I’ll put his quote below:

Yeah, there’s repetitions of the same error in here:

2018-04-25T12:43:38.725Z - error: [ui] `git -c credential.helper= checkout --progress overleaf/master -b master --` exited with an unexpected code: 128.
fatal: A branch named 'master' already exists.

I gather that the existing master is tracking origin/master or something similar.

A potential solution for this would be to, in cases where an existing local branch exists and will clash, use the convention {remote}-{branch} when the user wants to checkout the same branch from another remote.

I would think that changing the branch would fix the error that you’re experiencing. Would you try changing the branch name to something other than ‘master’ and see if that fixes the error? Here’s a guide on GitHub on how to do that.

Let me know if this fixes the error that you’re having or if you’re still experiencing the same issue.

Thanks,
Nicholas Hickam