The error in the title may appear when running kubectl commands.
This error message indicates one of two things:
1. The path to a kubernetes config file has not been set as an environmental variable
After running the export command, kubectl commands should execute as expected. If the commands continue to throw the error message, proceed to Option 2 below.
2. The kubelet service is not running
systemctl status kubelet
Option 2 may need to be run a couple times, as the service could be in state where it is starting, activating or running (but crashing). If the service does not stay in a running state after a few checks, then please submit a support ticket to Customer Success.