I keep hitting this tonight, when posting or editing a comment. And then I leave the post, and get back to the post again, try again, and it works. No idea what’s up.

EDIT: oh, this one worked on first try! But not this edit. ;)

This was an issue with Lemmy.world. Should be fixed now.

There was a Lemmy hack a few days ago. I think as a fix to that most people had their login cookies invalidated. Logging in should fix that though so you might be having a different issue