I think that's not good

I’m trying to change my preferences, but it appearrs a message :
“Oops, that page does not exists or it’s private.”

Oh boy.
I see your point.
I am not able to see my summary either.

Hopefully, it is just a weird glitch that will go away soon.
I’ll reach to the other moderators and staff to see if they can see what the issue is.

Thanks for bringing this up!

Thank you for answer too!

I have another question: has this ever happened before?

Not to my knowledge.
But in the world of tech, things break unfortunately.

The team is hard at work to fix the issue.

It happened to me as well yesterday, but it looks like it resolved itself. Kudos to the FCC team for getting it fixed quickly.