[SOLVED]Jython scripting cannot find configuration.py

Hi OH community,

UPDATE: Solved! I still had a org.joda.time import in configuration.py which caused it to be skipped…

I have been absent from this forum and have not touched OpenHAB for quite a while because I was busy with other stuff (like starting my own business). Currently I am still running OH 2.5 in a container.

I use text-based configuration and copied the basic configuration to a new OH 3.3.0 Docker installation (using the official image), with just a few things, items, InfluxDB persistence and a few Python scripts copied. As part of the Python scripting support I installed the Helper Libaries as described by @CrazyIvan359 in Python Helper Libraries. The scripts did get loaded and a test script triggered, but I still get an error:

[INFO ] [e.automation.internal.RuleEngineImpl] - Rule engine started.
[INFO ] [rulesupport.loader.ScriptFileWatcher] - Loading script '/openhab/conf/automation/jsr223/python/core/000_Startup.py'
[WARN ] [jython.startup                      ] - 

*******************************************************************************
Jython version:             2.7.2.final
Operating system:           Linux
OS Version:                 5.10.0-15-cloud-amd64
Java vendor:                Eclipse Adoptium
Java VM name:               OpenJDK 64-Bit Server VM
Java runtime name:          OpenJDK Runtime Environment
Java runtime version:       11.0.15+10
configuration.py installed: False
sys.path:                   /openhab/conf/automation/lib/python
                            /openhab/userdata/cache/org.eclipse.osgi/245/0/bundleFile/Lib
                            __classpath__
                            __pyclasspath__/
*******************************************************************************

[INFO ] [rulesupport.loader.ScriptFileWatcher] - Loading script '/openhab/conf/automation/jsr223/python/core/components/100_DirectoryTrigger.py'
[WARN ] [jython.core.log                     ] - The 'configuration.py' file is missing from the python.path!
[INFO ] [rulesupport.loader.ScriptFileWatcher] - Loading script '/openhab/conf/automation/jsr223/python/core/components/100_StartupTrigger.py'
[WARN ] [jython.core.log                     ] - The 'configuration.py' file is missing from the python.path!
[INFO ] [rulesupport.loader.ScriptFileWatcher] - Loading script '/openhab/conf/automation/jsr223/python/personal/hue_set_scene.py'
[WARN ] [jython.core.log                     ] - The 'configuration.py' file is missing from the python.path!
[INFO ] [rulesupport.loader.ScriptFileWatcher] - Loading script '/openhab/conf/automation/jsr223/python/personal/test.py'
[INFO ] [org.openhab.core.automation.examples] - Hello world!

The file configuration.py is however present in /openhab/conf/automation/lib/python.
I must be missing some step… suggestions where to start looking?