Hi. aab@khp.ignorelist.com. I investigated remote follow problem to me in my server.
I could remote follow me from sennoken@gnusocial.net. So I think you can follow me now.

I removed activitypub_profile table record (uri=https://social.senooken.jp/senooken). It seems old developing activitypub data occured trouble.

And I removed duplicated this user ID records. Because, in previous conversation with you, it seems you replied my old duplicated account.

@administrator also can follow me.

If you are interested in me, please try remote follow me.