Make sure to pass id as a keyword argument.

Author: Qwerty-133

cogs/modmail.py

@@ -1042,7 +1042,7 @@ async def logs(self, ctx, *, user: User = None):
             thread = ctx.thread
             if not thread:
                 raise commands.MissingRequiredArgument(SimpleNamespace(name="member"))
-            user = thread.recipient or await get_or_fetch_user(self.bot, thread.id)
+            user = thread.recipient or await get_or_fetch_user(self.bot, id=thread.id)
 
         default_avatar = "https://cdn.discordapp.com/embed/avatars/0.png"
         icon_url = getattr(user, "avatar_url", default_avatar)