I've been trying to do the same today. I think it's more likely that your instance is blocking access to kbin altogether or specific magazines. For example, I have both a beehaw.org and lemmy.world account. I can access https://beehaw.org/c/[email protected] and can subscribe from that page but https://lemmy.world/c/[email protected] returns a 404: couldnt_find_community error.
The reason I think it might be instance specific versus, say a bug in the server version, is because https://lemmy.ml/c/[email protected] and https://beehaw.org/c/[email protected] both work and but https://lemmy.ml/c/[email protected] doesn't work. Presumably lemmy.ml is blocking the nsfw magazine.
Damn, that's not good. Following the radio mishap he's likely done after this right? I coped with Mountaineer football knowing that basketball would still be fun and competitive.