I tried it again it it worked. Probably just a hiccup.

Ah, I didn’t know that. Seems like they would need to find a volunteer to maintain that.

It doesn’t work. I entered my infos for both Lemmy and Mastodon, but when I select either Redirect buttons in the menu, nothing happens. (no error messages or anything) Any idea what I’m doing wrong?

Have you considered using Yunohost instead? I think it would let you skip a few steps?