Last week a friend tried to follow me from his Mastodon account. The follow-request never turned up on my Hubzilla channel. I then tried to add his Mastodon contact to my Hubzilla channel but again nothing changed on this end and in my contact list his channel lists as red, i.e. I don't have the permission to send anything to him. I then realized that I have another such contact on another Mastodon instance. However, it's only few contacts. Connecting to Mastodon accounts mostly works as expected.
I grepped through the
php.out and the access and error log of nginx without finding anything useful. Could someone give me a hint where to even start debugging this?