fix: Small fixes

src/routes/+error.svelte

@@ -5,7 +5,7 @@
 <div class=" bg-white dark:bg-gray-800 min-h-screen">
 	<div class=" flex h-full">
 		<div class="m-auto my-10 dark:text-gray-300 text-3xl font-semibold">
-			{$page.status}: {$page.error.message}
+			{$page.status}: {$page.error?.message}
 		</div>
 	</div>
 </div>