# Error on creating an IFrame

**URL:** <https://forum.mautic.org/t/error-on-creating-an-iframe/22995>\
**Category:** Development\
**Created:** [March 10, 2022, 7:55pm UTC](https://forum.mautic.org/t/error-on-creating-an-iframe/22995 "2022-03-10T19:55:47Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![NichMaia](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/nichmaia/32/6488_2.png) [@NichMaia](https://forum.mautic.org/u/NichMaia)\
**Post date:** [March 10, 2022, 7:55pm UTC](https://forum.mautic.org/t/error-on-creating-an-iframe/22995/1 "2022-03-10T19:55:47Z")

</div>

I’m using the following code to load a custom builder:

`  
Mautic.launchCustomBuilder = function (formName, actionName,elem) {  
var currentLink = mQuery(elem);  
var currentActiveTemplate = currentLink.attr(‘data-theme-beefree’);  
console.log(‘custom builder ‘,currentActiveTemplate);  
var builderUrl = (mQuery(’#builder\_url’).val()).replace(‘s/emails/’,‘s/beefree/email/’)+’?template=’ + currentActiveTemplate;  
console.log(‘builder url ‘,builderUrl);  
if ( (mQuery(’#builder\_url’).val()).indexOf(‘pages’) !== -1) {  
builderUrl = (mQuery(’#builder\_url’).val()).replace(‘s/pages/’,‘s/beefree/page/’)+’?template=’ + currentActiveTemplate;  
}

```
Mautic.loadNewWindowTemp({
    "windowUrl": builderUrl+"&t="+new Date().getTime(),
    "popupName": "beefreePopup"
});

```

}`

Out of nowhere, it stopped recognizing the function “loadNewWindowTemp”, throwing the following error:

```auto
Uncaught TypeError: Mautic.loadNewWindowTemp is not a function
    at Object.Mautic.launchCustomBuilder (VM6338 builder.js:11:12)
    at HTMLAnchorElement.onclick (VM7516 3:1:8)

```

Can someone assist me with this error?