In Firefox, I always have the following error message, "Auth failed (Code: 10302) " in login page (https://dash.cloudflare.com/login). In Google Chrome, I was logged in.
Clear the Firefox cache and restart the browser or retry in private mode.
Thanks. I have tried private mode, but it didn’t work.
I may figure out the reason.
By default, Firefox Enhanced Tracking Protection is enabled. When I turned off the Standard protection, I can access to the dashboard.
Did you try to clear your cache as @MarkMeyer suggested? How are you logging into the forum account? Is that a different address?