fix issue with config set

Author: fourjr

CHANGELOG.md

@@ -9,8 +9,14 @@ however, insignificant breaking changes do not guarantee a major version bump, s
 # 3.7.2
 
 ### Added
+
 - Added `mention_channel_id` to specify which channel `alert_on_mention` was being sent to ([GH #2880](https://github.com/kyb3r/modmail/issues/2880))
 
+### Fixed
+
+- `?config set` would not respond if an invalid key was provided.
+
+
 # v3.7.1
 
 ### Fixed

cogs/utility.py

@@ -772,7 +772,7 @@ async def config_set(self, ctx, key: str.lower, *, value: str):
                 title="Error", color=self.bot.error_color, description=f"{key} is an invalid key."
             )
             valid_keys = [f"`{k}`" for k in sorted(keys)]
-            embed.add_field(name="Valid keys", value=", ".join(valid_keys))
+            embed.add_field(name="Valid keys", value=truncate(", ".join(valid_keys), 1024))
 
         return await ctx.send(embed=embed)