Git extension was recently updated to version 2.3.0 in Plesk.
When navigating to Domains > example.com > Git and clicking on the Pull now button the following error appears:
Method name must be a string
#EXTGIT-265 "Fixed the issue with pulling from remote repositories."
- Git 2.3.1 18 October 2022
If update is not possible for some reason you may try the following