diff --git a/app/assets/javascripts/editor/ajax.js b/app/assets/javascripts/editor/ajax.js
index 971f75d6..127944f6 100644
--- a/app/assets/javascripts/editor/ajax.js
+++ b/app/assets/javascripts/editor/ajax.js
@@ -7,11 +7,12 @@ CodeOceanEditorAJAX = {
   },
 
   ajaxError: function(response) {
-    var message = ((response || {}).responseJSON || {}).message || '';
+    const responseJSON = ((response || {}).responseJSON || {});
+    const message = responseJSON.message || responseJSON.error || '';
 
     $.flash.danger({
       text: message.length > 0 ? message : $('#flash').data('message-failure'),
       showPermanent: response.status === 422,
     });
   }
-};
\ No newline at end of file
+};
diff --git a/app/assets/javascripts/exercises.js.erb b/app/assets/javascripts/exercises.js.erb
index 5ffea543..e648d2fe 100644
--- a/app/assets/javascripts/exercises.js.erb
+++ b/app/assets/javascripts/exercises.js.erb
@@ -110,11 +110,14 @@ $(document).on('turbolinks:load', function () {
         }
     }
 
-    var ajaxError = function (error) {
+    var ajaxError = function (response) {
+        const responseJSON = ((response || {}).responseJSON || {});
+        const message = responseJSON.message || responseJSON.error || '';
+
         $.flash.danger({
-            text: $('#flash').data('message-failure')
+            text: message.length > 0 ? message : $('#flash').data('message-failure'),
+            showPermanent: response.status === 422,
         });
-        Sentry.captureException(JSON.stringify(error));
     };
 
     var buildCheckboxes = function () {
diff --git a/app/views/request_for_comments/show.html.slim b/app/views/request_for_comments/show.html.slim
index 890d371c..b06cee5b 100644
--- a/app/views/request_for_comments/show.html.slim
+++ b/app/views/request_for_comments/show.html.slim
@@ -469,9 +469,11 @@ javascript:
   }
 
   function ajaxError(response) {
-    var message = ((response || {}).responseJSON || {}).message || '';
+    const responseJSON = ((response || {}).responseJSON || {});
+    const message = responseJSON.message || responseJSON.error || '';
 
     $.flash.danger({
-      text: message.length > 0 ? message : $('#flash').data('message-failure')
+      text: message.length > 0 ? message : $('#flash').data('message-failure'),
+      showPermanent: response.status === 422,
     });
   }