BTW from the log you attached:

File "/root/.clearml/venvs-builds/3.6/lib/python3.6/site-packages/clearml/storage/helper.py", line 218, in StorageHelper
_gs_configurations = GSBucketConfigurations.from_config(config.get('google.storage', {}))

This means it tries to remove an artifact from a Task, that artifact is probably in GS (i'm assuming because it is using the GS api), and the cleanup service is missing the GS configuraiton.
WackyRabbit7 is that possible ?