error/analytics/errorprocessornotready

You may see an error if you have installed the Python learning analytics backend, but the version of Moodle you are using requires a more recent backend. From a shell, do this:

$ sudo -H python3 -m pip install "moodlemlbackend==2.4.*" Collecting moodlemlbackend==2.4.* ... Installing collected packages: moodlemlbackend

 Found existing installation: moodlemlbackend 2.3.0
   Uninstalling moodlemlbackend-2.3.0:
     Successfully uninstalled moodlemlbackend-2.3.0

Successfully installed moodlemlbackend-2.4.0

Check the documentation for the correct version of moodlemlbackend to install for your version of Moodle.