diff --git a/agon/utils.py b/agon/utils.py
index bb4a74c..5fed6db 100644
--- a/agon/utils.py
+++ b/agon/utils.py
@@ -342,11 +342,13 @@ async def send_highscore_message(session: Session, guild: nextcord.Guild, group:
         group (CategoryGroup): group to post to the message.
     """
     highscore_string = format_highscore_message(session, group)
-    channel = guild.get_channel(group.channel_id)
+    if (channel := guild.get_channel(group.channel_id)) is None:
+        agon_logger.error("Channel id %s in guild %s does not exist.", group.channel_id, guild.id)
+        return
 
-    if not isinstance(channel, nextcord.TextChannel):
+    if not isinstance(channel, nextcord.TextChannel) or not isinstance(channel, nextcord.Thread):
         agon_logger.error(
-            "Channel id %s in guild %s is does not correspond to a TextChannel.", channel.id, channel.guild.id
+            "Channel id %s in guild %s is does not correspond to a TextChannel or Thread.", channel.id, channel.guild.id
         )
         return