Fixed observer missing parameter

docs/CHANGELOG.md

@@ -13,6 +13,7 @@ Changelog
 - Fix #423: Fix rendering of attached files on new reply by PushService
 - Enh #424: Allow sending a message with attached files only, such as an image
 - Enh #426: Reduce translation message categories
+- Fix #428: Fixed observer missing parameter 
 
 3.2.2 (July 9, 2024)
 --------------------

resources/js/humhub.mail.ConversationView.js

@@ -230,7 +230,7 @@ humhub.module('mail.ConversationView', function (module, require, $) {
         var observer = new MutationObserver(function () {
             that.updateSize(true);
         });
-        filePreview.each(function () {
+        filePreview.each(function (index, element) {
             observer.observe(element, { childList: true, subtree: true });
         });
 

resources/js/humhub.mail.messenger.bundle.js

@@ -230,7 +230,7 @@ humhub.module('mail.ConversationView', function (module, require, $) {
         var observer = new MutationObserver(function () {
             that.updateSize(true);
         });
-        filePreview.each(function () {
+        filePreview.each(function (index, element) {
             observer.observe(element, { childList: true, subtree: true });
         });