Sorry to hear that restarting Axure RP didn’t resolve this issue for you! Getting a new local copy of the team project is the next best step if restarting does not fix the issue.
I also wanted to mention that you can get a new local copy without losing your local work that hasn’t been checked in yet. You should be able to export a non-team version of the existing local copy, import those local changes into the fresh local copy, and then check them in. You can find more information about this process in the Team Projects Troubleshooting article here:
Hopefully this helps some!