fix: return 404 when tournament not found

frontend/static/js/api/tournament/tournament.js

@@ -37,7 +37,7 @@ class Tourmanent
 		let response = await this.client._get(`/api/tournaments/${id}`);
 
 		if (response.status === 404)
-			return null;
+			return 1;
 
 		let response_data = await response.json();