bot/src/modules/achievements/events/achievement_on_message_event.py

@@ -50,7 +50,9 @@ class AchievementOnMessageEvent(OnMessageABC):
             return
 
         server = self._servers.get_server_by_discord_id(message.guild.id)
-        user = self._users.get_user_by_discord_id_and_server_id(message.author.id, server.id)
+        user = self._users.find_user_by_discord_id_and_server_id(message.author.id, server.id)
+        if user is None:
+            return
 
         user.message_count += 1
         self._users.update_user(user)

bot/src/modules/base/events/base_on_message_event.py

@@ -86,6 +86,11 @@ class BaseOnMessageEvent(OnMessageABC):
         if message is None or message.guild is None:
             return
 
+        server = self._servers.get_server_by_discord_id(message.guild.id)
+        user = self._users.find_user_by_discord_id_and_server_id(message.author.id, server.id)
+        if user is None:
+            return
+
         self._logger.info(__name__, f"Received message: {LogMessageHelper.get_log_string(message)}")
         self._append_received_message_count(message.guild.id)