Error while Sync: 'There is no tracking information for the current branch. Please specify which branch you want to merge with

Hi, I get this from the coder while trying to run my experiment online:

Synchronising…
Pulling changes from remote…Traceback (most recent call last):
File “/Applications/PsychoPy3.app/Contents/Resources/lib/python3.6/psychopy/app/pavlovia_ui/project.py”, line 490, in syncProject
File “/Applications/PsychoPy3.app/Contents/Resources/lib/python3.6/psychopy/projects/pavlovia.py”, line 622, in sync
File “/Applications/PsychoPy3.app/Contents/Resources/lib/python3.6/psychopy/projects/pavlovia.py”, line 667, in pull
File “/Applications/PsychoPy3.app/Contents/Resources/lib/python3.6/psychopy/projects/pavlovia.py”, line 658, in pull
File “/Applications/PsychoPy3.app/Contents/Resources/lib/python3.6/git/cmd.py”, line 548, in
File “/Applications/PsychoPy3.app/Contents/Resources/lib/python3.6/git/cmd.py”, line 1014, in _call_process
File “/Applications/PsychoPy3.app/Contents/Resources/lib/python3.6/git/cmd.py”, line 825, in execute
git.exc.GitCommandError: Cmd(‘git’) failed due to: exit code(1)
cmdline: git pull
stderr: 'There is no tracking information for the current branch.
Please specify which branch you want to merge with.
See git-pull(1) for details.

git pull <remote> <branch>

If you wish to set tracking information for this branch you can do so with:

git branch --set-upstream-to=origin/<branch> master

What does it mean? Please, help me.
Thanks

I’ve deleted all the projects on pavlovia and the hidden git folders on my mac. I’ve tried again and now everything worked just fine. The problem seemed to be solved.