@praetorim @pfefferle Wenn Matthias damit einverstanden ist, sehr gerne.

Hmmm, it could be related to a setting with Author profile in Yoast. It says “Make sure your blog’s author profile page is active if you are using author profiles.”

I've been trying to get ActivityPub working on my site, but I must be overlooking something. I can't get it to post. Anyone around who rocks it?