Unable to subscribe to kbin instances

I'm unable to subscribe to kbin instances from my local server. Federating with Lemmy instances works just fine.

I have already applied the proposed fix from this thread with no change. https://lemmy.ml/post/1725714?scrollToComments=true

Is there a way to debug this? Logs are provide no clue.

Didn't want to create another post but I wasn't subscribed to this community until now and registrations on .ml is closed.