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/kbinmeta@kbin.social and can subscribe from that page but https://lemmy.world/c/kbinmeta@kbin.social returns a 404: couldnt_find_community error.
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/kbinmeta@kbin.social and can subscribe from that page but https://lemmy.world/c/kbinmeta@kbin.social 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/kbinmeta@kbin.social and https://beehaw.org/c/nsfw@kbin.social both work and but https://lemmy.ml/c/nsfw@kbin.social doesn’t work. Presumably lemmy.ml is blocking the nsfw magazine.