Update error def

frontend/src/app.d.ts

@@ -4,7 +4,6 @@ declare global {
 	namespace App {
 		export interface Error {
 			message: string;
-			errorId: string;
 		}
 		// interface Locals {}
 		// interface PageData {}

frontend/src/routes/+page.ts

@@ -1,6 +1,5 @@
-
 import { error } from '@sveltejs/kit';
-import {PUBLIC_BACKEND_URL} from '$env/static/public';
+import { PUBLIC_BACKEND_URL } from '$env/static/public';
 
 const API_URL = `${PUBLIC_BACKEND_URL}/api`;
 
@@ -10,7 +9,7 @@ export async function load({ fetch }) {
 		const response = await fetch(`${API_URL}/route-categories`);
 		categories = await response.json();
 	} catch (ex) {
-        error(404, "API Not Found");
+		error(404, { message: 'API Not Found'});
 	}
 
 	return { categories };