Google Analytics – gtag event contact form

Hi,

i have a Problem with Google Analytics and the gtag / contact form event.

I am using the following Analytics Code:
<!– Global site tag (gtag.js) – Google Analytics –>
<script async src=”https://www.googletagmanager.com/gtag/js?id=UA-133307688-1″></script&gt;
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag(‘js’, new Date());

gtag(‘config’, ‘UA-133307688-1’, { ‘anonymize_ip’: true });
</script>

I am using this in the child functions.php
add_filter(‘avf_contact_form_submit_button_attr’,’avia_add_submit_attributes_to_cf’, 10, 3);
function avia_add_submit_attributes_to_cf($att, $formID, $form_params){
$gaq = “_gaq.push([‘_trackPageview’, ‘UA-133307688-1’]);”;
$att = “onclick=\”gtag(‘send’, ‘event’, ‘Submit’, { ‘event_category’ : ‘Contactform’, ‘event_label’ : ‘Form-Submit’, ‘value’: 1 });”;
return $att;
}

And I am using this Event config.
Link: https://ibb.co/Y0sy3rd

But its not working, can you help me?

Thanks, Ronald