Plugin not loading due to PIL import error (Docker image)

[apfelnutzer]

The plugin is not loading anymore:

ImportError: cannot import name '_imaging' from 'PIL' (/octoprint/plugins/lib/python3.8/site-packages/PIL/__init__.py)

I use the octoprint/octoprint docker image with ID 32d643752f07 (latest as per today).

According to Octoprint this error is related to the plugin itself: see issue I raised for Octoprint.