Fix bug

Author: kyb3r

core/thread.py

@@ -803,8 +803,8 @@ def format_info_embed(self, user, log_url, log_count, color):
         else:
             embed.description += "."
 
-        mutual_guilds = [g for g in self.bot.guilds if user in g]
-        if user not in self.bot.modmail_guild or len(mutual_guilds) > 1:
+        mutual_guilds = [g for g in self.bot.guilds if user in g.members]
+        if user not in self.bot.modmail_guild.members or len(mutual_guilds) > 1:
             embed.add_field(
                 name="Mutual Servers", value=", ".join(g.name for g in mutual_guilds)
             )