diff --git a/scripts.js b/scripts.js
index 9e42ef7..fb07423 100644
--- a/scripts.js
+++ b/scripts.js
@@ -32,9 +32,14 @@ function generateLink() {
 
     if (selectedCourseFromPicker === '-1') {
         let providedRaPlaLink = $('#raplalink').val().toString();
-        const url = new URL(providedRaPlaLink);
-        raplaUser = url.searchParams.get('user');
-        raplaFile = url.searchParams.get('file');
+        if(providedRaPlaLink !== '') {
+            const url = new URL(providedRaPlaLink);
+            raplaUser = url.searchParams.get('user');
+            raplaFile = url.searchParams.get('file');
+        } else {
+            $('#full-link').text('Please provide either a course or a RaPla Link!');
+            return;
+        }
     } else {
         let courseInfo = courseLinks[selectedCourseFromPicker];
         raplaUser = courseInfo.user;