Hi @M.Mustafa_Amarkhil -
This error can occur if your metadata database was previously configured for Charts, but the authentication keys are not present in the volume used by your current Charts instance. Without knowing all the steps you followed it’s hard to say how you got in this state. But if you’re happy to start fresh, you should be able to get past this by deleting the app, auth, log and metadata databases, as well as your Docker volumes, and then reinstalling.
HTH
Tom