diff --git a/pages/ajax.render.php b/pages/ajax.render.php
index 0ca194927a..773bff0622 100644
--- a/pages/ajax.render.php
+++ b/pages/ajax.render.php
@@ -2691,33 +2691,31 @@ EOF
 			$oAjaxRenderController->GetMenusCount($oPage);
 			break;
 
-			//--------------------------------
-			// WelcomePopupMenu
-			//--------------------------------
-			case 'welcome_popup.acknowledge_message':
-				$oPage = new JsonPage();
-				try {
-					$oController = new WelcomePopupController();
-					$oController->AcknowledgeMessage();
-					$aResult = ['success' => true];
-				}
-				catch (Exception $oException) {
-					$aResult = [
-						'success'       => false,
-						'error_message' => $oException->getMessage(),
-					];
-				}
-				$oPage->SetData($aResult);
-				break;
+		//--------------------------------
+		// WelcomePopupMenu
+		//--------------------------------
+		case 'welcome_popup_acknowledge_message':
+			$oPage = new JsonPage();
+			try {
+				$oController = new WelcomePopupController();
+				$oController->AcknowledgeMessage();
+				$aResult = ['success' => true];
+			}
+			catch (Exception $oException) {
+				$aResult = [
+					'success'       => false,
+					'error_message' => $oException->getMessage(),
+				];
+			}
+			$oPage->SetData($aResult);
+			break;
 				
-			default:
-				$oPage->p("Invalid query.");
-		}
+		default:
+			$oPage->p("Invalid query.");
 	}
 	$oKPI->ComputeAndReport('Data fetch and format');
 	$oPage->output();
-} catch (Exception $e)
-{
+} catch (Exception $e) {
 	// note: transform to cope with XSS attacks
 	echo htmlentities($e->GetMessage(), ENT_QUOTES, 'utf-8');
 	IssueLog::Error($e->getMessage()."\nDebug trace:\n".$e->getTraceAsString());
diff --git a/sources/Controller/WelcomePopupController.php b/sources/Controller/WelcomePopupController.php
index cb7989203b..1919b30924 100644
--- a/sources/Controller/WelcomePopupController.php
+++ b/sources/Controller/WelcomePopupController.php
@@ -9,7 +9,7 @@ use utils;
  * @since 3.1.0
  *
  */
-class WelcomePopupController extends AbstractController
+class WelcomePopupController
 {
 	/**
 	 * Operation: welcome_popup.acknowledge_message
diff --git a/templates/pages/backoffice/welcome_popup/welcome_popup.ready.js.twig b/templates/pages/backoffice/welcome_popup/welcome_popup.ready.js.twig
index 6be19799db..35959ec5f3 100644
--- a/templates/pages/backoffice/welcome_popup/welcome_popup.ready.js.twig
+++ b/templates/pages/backoffice/welcome_popup/welcome_popup.ready.js.twig
@@ -20,7 +20,7 @@ $('.ibo-welcome-popup--indicator').click(function() {
 });
 $('.ibo-welcome-popup--button').click('button', function() {
 	const id = $(this).attr('data-message-uuid');
-	$.post(GetAbsoluteUrlAppRoot()+'pages/ajax.render.php', {operation: 'welcome_popup.acknowledge_message', message_uuid: id});
+	$.post(GetAbsoluteUrlAppRoot()+'pages/ajax.render.php', {operation: 'welcome_popup_acknowledge_message', message_uuid: id});
 	const escaped_id = id.replace(/\\/g, '\\\\');;  // All backslashes must be doubled in a jQuery selector
 	$('.ibo-welcome-popup--message[data-message-uuid="'+escaped_id+'"]').remove();
 	if($('.ibo-welcome-popup--message').length == 0) {