diff --git a/apps/dashboard/src/lib/utils/services/marks/index.js b/apps/dashboard/src/lib/utils/services/marks/index.js
index 1f3749e1..3f9807a2 100644
--- a/apps/dashboard/src/lib/utils/services/marks/index.js
+++ b/apps/dashboard/src/lib/utils/services/marks/index.js
@@ -1,7 +1,7 @@
 import { supabase } from '$lib/utils/functions/supabase';
 
 export async function fetchMarks(courseId) {
-  const { data } = await supabase.rpc('get_marks').eq('course_id', courseId);
+  const { data, error } = await supabase.rpc('get_marks').eq('course_id', courseId);
 
-  return { data };
+  return { data, error };
 }
diff --git a/apps/dashboard/src/routes/courses/[id]/marks/+page.svelte b/apps/dashboard/src/routes/courses/[id]/marks/+page.svelte
index 436c1b4d..78f3e418 100644
--- a/apps/dashboard/src/routes/courses/[id]/marks/+page.svelte
+++ b/apps/dashboard/src/routes/courses/[id]/marks/+page.svelte
@@ -13,9 +13,9 @@
   import { profile } from '$lib/utils/store/user';
   import { browser } from '$app/environment';
   import { course } from '$lib/components/Course/store';
+  import { snackbar } from '$lib/components/Snackbar/store';
 
   export let data;
-  const { courseId } = data;
 
   let borderBottomGrey = 'border-r-0 border-t-0 border-b border-l-0 border-gray-300';
   let borderleftGrey = 'border-r-0 border-t-0 border-b-0 border-l border-gray-300';
@@ -35,7 +35,14 @@
   }
 
   async function firstRender(courseId: string) {
-    const { data: marks } = await fetchMarks(courseId);
+    const { data: marks, error } = await fetchMarks(courseId);
+    if (error) {
+      console.error('Error fetching marks', error);
+      snackbar.error('Error fetching marks');
+      return;
+    }
+
+    if (!marks || !Array.isArray(marks)) return;
 
     marks.forEach((mark) => {
       const { groupmember_id, exercise_id, total_points_gotten } = mark;