We have not been contacted with such a problem before, are there any errors in Graphite log? If there are errors, please attach them to this post, so we can review them.
When I pulled your project locally, the Commit menu is enabled and has 12 modified items and 9 renamed. In History I see three commits from 13th. If I change the repo in "Configure Remote Repository" menu I am able to commit and push changes without any problems.
If something has gone wrong, it is definitely on your local machine, you can try saving your changes in external editor, pull your project from the github repo again and reapply them.
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