I know this is an old post. I’m sorry if this fills up your messaging box.
I think I managed to “solve” part of the problem.
1 - The “client” instance you should do “Prune” from Docker. (I think it may be optional - But to know more Look for “Prune System” in the Docker documentation). Do not prune the “Rancher Server” instance.
2 - Update the instances time (clock) with your machine (the one you use to access the Rancher UI) I have this reference for this https://github.com/rancher/rancher/issues/10770
PS. All instances need to be with time in “sync”.
3 - How you cleaned thoroughly with Docker Prune System. Raise a new Rancher client. As usual.
4 - Open “Developer Tools” in Chrome. (I think it gives different aproachs in different browsers for this process) Then you go to the “Application” tab and then in the sidebar go search again for “Application” and then you will see a “Clear Storage” option. Click “Clear Site Data”.
This way you will clear everything related to the Rancher UI. Any cookie or whatever. This also works for issues related to other services. Like Youtube, it sometimes “bug” it and gives a grotesque server error. Claiming that you did something prohibited. Just do the fourth step that solves this. You’ll just have the job of re-entering all Google accounts again. Cuz clean of all Google services.