EDIT: I think logging out, telling Firefox to forget about memrise.com, and then logging back in and accepting a fresh set of cookies might have fixed things. My dashboard seems to be working again.
I’m using current Firefox browser on a desktop PC with EndeavorOS (based on Arch Linux).
I have cleared my cache and cookies and restarted Firefox.
I have logged out and logged back in.
I have disabled my ad-blocker and re-added some courses, but they still don’t show up in my dashboard (even after I have gone through some exercises).
I am primarily using community courses for Chinese, plus the official classic version of Chinese 1 for English speakers.
Update: I added Spanish (Mexico) (official early-access course) and my dashboard still shows the error message but no courses.
The dashboard page is also trying to connect to Facebook. WHY? How do I disconnect my Memrise account from my Facebook account?
The link I provided works on the classic version, I didn’t test it against “Early Access”, so it might be different there.
However, I can’t imagine that they keep two settings for the two “worlds”, so in case you’re using “Early Access” I’d suggest you switch to classic, change the setting and then go back to “Early Access”.
EDIT: I just went ahead and tested this with “Early Access” - the link works fine here either way (Firefox and Chrome under Windows 11):