Error, when trying to set up a pipeline

when i try to set up a pipeline and authenticate via oauth to github, get the following error:
failed to decode the config, error: 1 error(s) decoding: * ‘ManagedFields[0].Time’ expected a map, got 'string’

Same with bitbucket…
I followed the docs to set it up. Does anyone have an idea, what im doing wrong?

Rancher version: v2.4.3
Kubernetes version: v1.18

Thank you,