diff --git a/datamodels/2.x/itop-portal-base/portal/src/views/layout.html.twig b/datamodels/2.x/itop-portal-base/portal/src/views/layout.html.twig
index 54d2ca62e9..d9a2372084 100644
--- a/datamodels/2.x/itop-portal-base/portal/src/views/layout.html.twig
+++ b/datamodels/2.x/itop-portal-base/portal/src/views/layout.html.twig
@@ -388,6 +388,16 @@
 					sUrl += (sUrl.split('?')[1] ? '&':'?') + sParamName + '=' + sParamValue;
 					return sUrl;
 				};
+				// Test is sString is a valid JSON string
+				var IsJSONString = function(sString)
+				{
+					try {
+						JSON.parse(sString);
+					} catch (oException) {
+						return false;
+					}
+					return true;
+				}
 				var GetContentLoaderTemplate = function()
 				{
 					return '<div class="content_loader"><div class="icon glyphicon glyphicon-refresh"></div><div class="message">{{ 'Page:PleaseWait'|dict_s }}</div></div>';
@@ -460,6 +470,19 @@
                         {
                             ShowErrorDialog('{{ 'UI:ObjectDoesNotExist'|dict_s|escape('js') }}', '{{ 'Error:HTTP:404'|dict_s|escape('js') }}');
                         }
+                        else if(oXHR.responseText !== undefined && IsJSONString(oXHR.responseText) === true)
+                        {
+                            var oData = JSON.parse(oXHR.responseText);
+                            // Catching AJAX exception with detailed error.
+                            if( (oData.error_message !== undefined) && (oData.error_title !== undefined) )
+                            {
+                                ShowErrorDialog(oData.error_message, oData.error_title);
+                            }
+                            else
+                            {
+                                ShowErrorDialog();
+                            }
+                        }
                         else
                         {
                             ShowErrorDialog();
diff --git a/datamodels/2.x/itop-portal-base/portal/web/css/portal.css b/datamodels/2.x/itop-portal-base/portal/web/css/portal.css
index 89275acfee..26d4be19c8 100644
--- a/datamodels/2.x/itop-portal-base/portal/web/css/portal.css
+++ b/datamodels/2.x/itop-portal-base/portal/web/css/portal.css
@@ -263,6 +263,10 @@ footer {
 /******************/
 /* Modal settings */
 /******************/
+#modal-for-alert {
+  z-index: 9999;
+  /* Should always be on top to display errors messages */
+}
 .modal-content .content_loader {
   margin: 7em 0em;
   text-align: center;
diff --git a/datamodels/2.x/itop-portal-base/portal/web/css/portal.scss b/datamodels/2.x/itop-portal-base/portal/web/css/portal.scss
index 48528507d0..b73b4fd1d1 100644
--- a/datamodels/2.x/itop-portal-base/portal/web/css/portal.scss
+++ b/datamodels/2.x/itop-portal-base/portal/web/css/portal.scss
@@ -278,6 +278,9 @@ footer{
 /******************/
 /* Modal settings */
 /******************/
+#modal-for-alert{
+	z-index: 9999; /* Should always be on top to display errors messages */
+}
 .modal-content .content_loader{
 	margin: 7em 0em;
 	text-align: center;
diff --git a/datamodels/2.x/itop-portal-base/portal/web/js/portal_form_handler.js b/datamodels/2.x/itop-portal-base/portal/web/js/portal_form_handler.js
index 91aeaefd7d..68bf632af0 100644
--- a/datamodels/2.x/itop-portal-base/portal/web/js/portal_form_handler.js
+++ b/datamodels/2.x/itop-portal-base/portal/web/js/portal_form_handler.js
@@ -175,7 +175,15 @@ $(function()
 													// Passing formmanager data to the next page, just in case it needs it (eg. when applying stimulus)
 													formmanager_class: me.options.formmanager_class,
 													formmanager_data: JSON.stringify(me.options.formmanager_data)
-												}
+												},
+                                                function(oData, sStatus, oXHR)
+                                                {
+                                                    if(sStatus === 'error')
+                                                    {
+                                                        // Hiding modal in case of error as the general AJAX error handler will display a message
+                                                        oModalElem.modal('hide');
+                                                    }
+                                                }
 											);
 											
 											oModalElem.modal('show');