Index: lams_build/conf/whiteboard/src/js/main.js
===================================================================
diff -u -r6583579862c8623515c9861dd8edec09b6d1898f -r5d948f270c07f066b302244d52aaf3ec7b5a64a7
--- lams_build/conf/whiteboard/src/js/main.js	(.../main.js)	(revision 6583579862c8623515c9861dd8edec09b6d1898f)
+++ lams_build/conf/whiteboard/src/js/main.js	(.../main.js)	(revision 5d948f270c07f066b302244d52aaf3ec7b5a64a7)
@@ -633,6 +633,7 @@
                         reader.readAsDataURL(blob);
                         reader.onloadend = function () {
                             const base64data = reader.result;
+
                             uploadImgAndAddToWhiteboard(base64data);
                         };
                     } else if (isPDFFileName(filename)) {
@@ -822,6 +823,7 @@
         false
     );
 
+
     function uploadImgAndAddToWhiteboard(base64data) {
         const date = +new Date();
         $.ajax({
@@ -836,9 +838,8 @@
             success: function (msg) {
                 const { correspondingReadOnlyWid } = ConfigService;
                 const filename = `${correspondingReadOnlyWid}_${date}.png`;
-                const rootUrl = document.URL.substr(0, document.URL.lastIndexOf("/"));
                 whiteboard.addImgToCanvasByUrl(
-                    `${rootUrl}/uploads/${correspondingReadOnlyWid}/${filename}`
+                    `/uploads/${correspondingReadOnlyWid}/${filename}`
                 ); //Add image to canvas
                 console.log("Image uploaded!");
             },