ok – sorry that is the other Events Plugin.
Seems that both plugins: Events Manager and Events Calendar got this feature of “Add to calendar”

And maybe it is better to get rid of the whole wrapper :

#top .tribe-events-c-subscribe-dropdown__container {
  display: none !important;
}

try – because it seems only be shown on single events page:

#top.single-event .em-event-add-to-calendar {
  display: none;
}

Are you able to influence the trigger? why don’t you use a.avia-button
or would you like to differentiate which buttons were clicked? In this case, you have to use the generated unique class as a trigger for each button element. f.e. a.av-av_button-60d3b58ef6e39d033d89831f5df0c979 – you can see that on dev tools what unique class is added.

Next: you can use that custom class on the anchor element itself by having a child-theme buttons.php.
if you would like to have that solution – you only have to edit that buttons.php to add the {$meta['el_class']} to the anchor too.

see: https://pastebin.com/jT1B5XJa
on line 758 i added that class as custom-class-button (which is added on line 764 to the wrapper element)

disadvantage of this quick change: if two custom classes are assigned – only the last one receives this addendum

(if you do not know how to use child-theme alb elements – tell me – or look to https://kriesi.at/documentation/enfold/intro-to-layout-builder/#customization )

See: https://webers-testseite.de/button-class-to-anchor-tag/
–

Thenn you can use as trigger (in this case) : a.conversion-button

next : did you use a grafic tool to replace jpgs with webp images?
the small view image is shown as jpg file ( with source webp )
Have you checked the settings – if there is a compression level for this replacement?
( 500×750 not blurry and 470px × 705px (scaled to 200px × 300px) blurry ) – so scaling might be a problem too.

Honestly, I think it would be an improvement to have an element that could contain other ALB elements, but is not itself a full-width element, and thus allows a sidebar to be placed next to it. Benefit is on that a possibility to have common background-image. Etc.

by the way – if your logo svg is well designed – you can change on inline svg fillings with quick css.
because you do not have a shrinking header – you can use for that the header class: av_header_transparency

f.e.:

.av_header_transparency .logo .st0 {
   fill: #4e4e4e
}

and here you can see the benefit of reworking the svg code – that class ( or there might be other path on that page) are allways the same for standard Illustrator setting.
_______________

btw: if you got a shrinking header you can use the class on html in combination with the class header-scrolled.

.html_header_transparency #header:not(.header-scrolled) .logo .st0 {
  fill: #4e4e4e
}

Just for info: I always recommend reworking the code of Illustrator-generated svg. Illustrator assigns a standard class with a counting index (st0, st1, st2 etc.). Unfortunately, if there are several inline svg on a page, the last svg on the page determines the properties of the class. Just css.
Either you edit the svg in a good text editor, or you define your own graphic styles in Illustrator for the fillings of the graphic elements. The graphic styles are then transferred to the svg code as a class.

but all downloads of that page you mentioned https://kriesi.at/documentation/enfold/icon/#download-fontello-or-flaticon-icons-included-in-enfold-demos are zip files that could be uploaded directly to enfold on enfold-child – import/export – Iconfont Manager
i tested it with the medical zip – and it works with no problem.
You had to upload that zip file without unpacking that file.

for those videos – best would be to have as selector a custom class if you like.
the best Way is to enter the aspect ration values to the element itself.
To show you for that page – that it is possible: – the aspect ratio of your video is on that: 1500/844 = 1.78

.avia-video.av-7fxcr-5428f1f56eaafaaab4a35f67598764cf,
.avia-video.av-lt51yanl-0fcc2bc8059b72cc4fbc0bf7e143adfe {
  padding-bottom: 178%;
}

that is what happens (calculation of that padding-bottom value) if you enter those correct ratios to the Element:

can you please test that snippet!
if you like to have 4 columns – just change it.

if you like to show the blog – then the context is not archive – it is index then ;)

PS: alb element = advanced layout builder element : if you use that – the element itself got some options to define the thumbnail size which is used.
but, as I suspected, you are not using this option

on Enfold : where did you load your jQuery in the header or have you set to load jQuery in the footer?
hasClass belongs to jQuery – but if you load jQuery later than there will be this error. Maybe your plugin has the option too – to load the scripts later.

And you are realy shure that you haven’t set it with Quotationmarks?
Open that element and maybe make a screenshot as i do.

the default quotationmarks in the playlist belongs to mediaplayer of wordpress – and could be deleted by that known snippet:
https://pastebin.com/k0f385TJ

But on top – these comes from Title and Description field of the media library.

Web-safe fonts are fonts that can adapt to any browser on any device. By using these types of fonts, web designers and developers ensure that the intended font will always display properly on a web page, even if these fonts aren’t installed on the user’s computer.

Since this was clear to me, I honestly didn’t read any further about your explanation there. There are quite a few more that could be listed here. But Copperplate does not belong here.

here is the official W3C List:
https://www.w3schools.com/cssref/css_websafe_fonts.php

please show me your page. If you can not make it public – you had to wait for a mod.

can you put this in your child-theme functions.php:

function insert_a_whatsapp_button() { 
?>
<script>
(function($){
	$( '#top' ).append('<div class="whatsapp-button"><a href="https://wa.me/3483883844?text=Salve,%20vorrei%20chiedere%20informazioni" target="_blank"><img width="80" height="80" src="https://srgl.it/aom/wp-content/uploads/2024/03/whatsapp_img-80x80.png" class="image wp-image-864 wa_img attachment-thumbnail size-thumbnail" alt="" style="max-width: 100%; height: auto;" decoding="async" srcset="https://srgl.it/aom/wp-content/uploads/2024/03/whatsapp_img-80x80.png 80w, https://srgl.it/aom/wp-content/uploads/2024/03/whatsapp_img-36x36.png 36w, https://srgl.it/aom/wp-content/uploads/2024/03/whatsapp_img.png 149w" sizes="(max-width: 80px) 100vw, 80px"></a></div>');
	$('.whatsapp-button').css({
		"position": "fixed",
		"bottom": "120px",
		"right": "20px",
		"z-index": "500",
	})
})(jQuery);
</script>
<?php
}
add_action('wp_footer', 'insert_a_whatsapp_button');