@stackPeek You are currently on kbin.social so I assume kbin.social has been suspended (a.k.a. de-federated or blocked) from that server. On Mastodon, "Suspended" means totally blocked. You cannot follow anyone, they cannot follow you. All communication, including API requests, are blocked.
A Mastodon instance blocking kbin.social, is, to me, irrational behavior by the Admin and an extreme disservice to those on the server.