Made sure that we're in a server when checking for permissions

cogs/core.py

@@ -172,7 +172,7 @@ class Core:
 
         cmd = None
         page = 1
-
+        if ctx.message.server:
             perms = ctx.message.server.me.permissions_in(ctx.message.channel)
             if not (perms.embed_links and perms.add_reactions):
                 fmt = "I need the permissions `embed_links` and `add_reactions` to send my help message! " \