[Bugfix]

cron.py

@@ -11,7 +11,7 @@ def send_notification(maintainer, player, property, old_value, new_value):
     conn = sqlite3.connect(settings.db_path + '/slork.sqlite')
     conn.row_factory = sqlite3.Row
     cur = conn.cursor()
-    cur.execute(query, (maintainer))
+    cur.execute(query, (maintainer,))
     discord = cur.fetchone()['discord']
     query = """SELECT value FROM player
         WHERE maintainer = ?