Is there additional configuration for getting Fleet working on clusters created with Rancher, that is not mentioned in the documentation? The issue with "No clusters available" is not mentioned under troubleshooting, and as far as I can tell, there are no communication issues between the fleet agent running in the custom k3s cluster and the controller. Did not find anything specific to this issue in slack history nor github issues. Should I uninstall the fleet that came pre-installed with rancher? Is that one somehow different or broken?