[+] Skip if not graded

src/utils/course-utils.ts

@@ -24,6 +24,9 @@ export class CourseUtils
 
             // Skip courses without assignments
             if (course.assignments.length == 0) return;
+            
+            // Skip if there are no grading scale
+            if (course.grading.method == 'NOT_GRADED') return;
 
             // Add it to the list
             result.push(course);