Can't push to staging area?

[Bartosz Nitka]

I'm trying to update a diff and I run into this:

$ arc diff
Linting...
 LINT OKAY  No lint problems.
Running unit tests...
No unit test engine is configured for this project.
 PUSH STAGING  Pushing changes to staging area...
sudo: a password is required
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
 STAGING FAILED  Unable to push changes to the staging area.
Usage Exception: Failed to push changes to staging area. Correct the
issue, or use --skip-staging to skip this step.


I believe that it worked for me before with my setup, and I seem to be
in compliance with
https://ghc.haskell.org/trac/ghc/wiki/Phabricator#Startingoff:Fixingabugsubmittingareview

Any ideas?

Thanks,
Bartosz