whmcsZimbraEmail/templates/admin/controlers/configOptionsIntegration.tpl

<tr>
    <td colspan="2">
        {include file='assets/css_assets.tpl'}

        {if $isCustomIntegrationCss}
            <link rel="stylesheet" href="{$customAssetsURL}/css/integration.css">
        {/if}

        <div id="layers" class="layers-integration">
            <div class="lu-app">
                <div class="lu-app-main">
                    <div class="lu-app-main__body">
                        {$content}
                    </div>
                </div>
            </div>
        </div>

        {include file='assets/js_assets.tpl'}

        <script>
            function mgWaitForAssets(){
                setTimeout(function(){
                    if (typeof window.Vue === 'function' && typeof window.mgLoadPageContoler === 'function' 
                    && typeof window.initMassActionsOnDatatables === 'function') {
                        mgLoadPageContoler();
                        mgEventHandler.on('AppCreated', null, function(appId, params){
                            params.instance.$nextTick(function () {
                                initContainerTooltips('layers');
                            });
                        }, 1000)
                    } else {
                        mgWaitForAssets();
                    }
                }, 1000);
            }
            mgWaitForAssets();
        </script>
    </td>
</tr>