Can’t update, crashing the entire app

[rbmntjs]

RF Version 4.5 (build 2410282152) – Mechanic locks up when trying to update to 0.3.1.0.

Traceback (most recent call last):
  File "PyObjCTools/AppHelper.pyc", line 89, in scheduleCallWithDelay_
  File "PyObjCTools/AppHelper.pyc", line 105, in performCall
  File "/Users/robin/Code/RF-scripts/Robofont-3/Extensions/Mechanic2.roboFontExt/lib/mechanic2/extensionItem.py", line 217, in _remoteInstallCallback
    succes, installMessage = bundle.install(showMessages=self._showMessages)
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "lib/scripting/extensionBundle.pyc", line 490, in install
  File "lib/scripting/extensionBundle.pyc", line 559, in _install
  File "lib/scripting/extensionBundle.pyc", line 503, in deinstall
  File "lib/scripting/extensionBundle.pyc", line 627, in _deinstall
AttributeError: 'PosixPath' object has no attribute 'endswith'