Please switch off the merging of the js and css files anyway, then it will be easier for us to find the possible errors in the css.

Enfold (Child) – Leistung – “…Datei-Zusammenführung und -Komprimierung”

zudem musst du unbedingt etwas an deinen DSGVO Einstellungen ändern.
Ohne dass ich auf deiner Seite etwas geantwortet habe – oder schlimmer noch indem ich nur notwenigen Cookies zustimmte, wird google analytics und google tag manager geladen ( schrift lato ohnehin auch )
Wenn unsere Kollegen hier aus dem internationalen Ausland das machen ok, aber wir in Deutschland ( oder EU ) müssen uns daran streng halten ohne Opt-In hier nichts zuzulassen.
Deine Seite ist höchst abmahn-gefährdet deshalb.

when you hover on dashboard your CPT “Categories” what is shown on your browser for taxonomie as you can see here by portfolio:

this is the analogon in your code above – if it is as you suspect: publication_post
try:

function avf_change_which_archive($output){
	$term = get_term_by( 'slug', get_query_var( 'term' ), get_query_var( 'taxonomy' ) );
		if(is_tax('publication_post')){
			$output = __('Search for:','avia_framework')." ".$term->name; 
		} 
		else {
			$output = __('Archive for:','avia_framework')." ".$term->name; 
		}
	return $output;
}
add_filter('avf_which_archive_output','avf_change_which_archive', 10, 3);

Till a solution is found you can place the publishing date manually to your popups as:

<span class="date-published">xx.xx.2021</span>

The date will than be inserted automatically to your list.

See here : https://wordpress.org/support/topic/echo-get_the_date-in-popup-window/

i started a question on support forum of pum
i do not know why the code ( get_the_date) does not take the publishing date of the popup but only from the page where it is opened.

now try this in your child-theme functions.php:

function show_date_of_popup(){
?>
<script type="text/javascript">	
(function($) {
	$(document).ready(function(){ 	  
		$('.pum-trigger').each(function() {
			var pumPopup = $('.pum').css('display');
			var trigger_name = $(this).attr('class').split(' ')[0];
			var publishingDate = $(this).closest('#top').find('#'+trigger_name+' .date-published').text();
			var date_published = $('<span class="puplished">'+publishingDate+'</span>');
			$(this).append(date_published);	
		});
	});	
})(jQuery);	       
</script>
<?php
}
add_action('wp_footer', 'show_date_of_popup', 9999);

i can not see if the container of the pum-trigger will grow if the span is inserted.
after that we had to find the right css

PS : don’t know why your extra class is at the beginning – on my test installation it is after pum-trigger

try:

.pum-trigger {
  display: grid;
}
.pum-trigger .puplished {
    position: relative;
    padding: 3px 0 0;
    text-align: right;
}

PPS: can you change one publishing date of the popup to a different one.
and place that function on your child theme functions.php after the shortcode function of the date

What I don’t understand is why the standard trigger classes are no longer available. Normally a trigger on PUM is defined as class eg: popmake-2023 the opening popup has then the ID: pum-2023 ; this would be much easier to select than via a slug that hides in a data-attribute.

PS : and remove that code from above to insert the date of today

now the popups do not work.
To be precise : put in that image from above:

under “Hej alle”
the shortcode : <span class="date-published">[post_published]</span>

Guess the same thing here:
( click to enlarge: )

I will now try to explain it again.
When I click a link, I usually see a link target inside the DOM. I can follow this link target and try to find something there, which gives me the possibility to find out the publication date of the entry.
It already starts with the fact that I don’t even see which popup it will open with the popup maker.
There is no hint for it in the DOM.
So this is now going to curb even my enthusiasm to read into the plugin/script to offer you a solution. Here ends now my support for you for this request.
Sorry

read here an interesting article: https://css-tricks.com/how-do-you-do-max-font-size-in-css/

maybe you can use on quick css :

#top #wrap_all .main_color h1, #top #wrap_all .alternate_color h1 {
    font-size: min(max(36px, 10vw), 80px);
    line-height: 1.2em;
    font-weight: 900;
    text-transform: uppercase;
    hyphens: auto;
}

min(max(36px, 10vw), 80px); means max font-size is 80px – ( it starts shrinking when 80px is the 1/10 of the screen width (800px) )
if you got 5vw ( it starts shrinking when the 80px is 1/20 of the screen width ( it is 1600px )
36px is the min font-size

Test this on your site – if it is what you like to have:
(in child-theme functions.php)

function open_popup_and_show_date(){
?>
<script type="text/javascript">
(function($) {
	$(document).ready(function(){     
		$('.pum-trigger').one('click', function(){
			var today = new Date();
			var dd = ("0" + today.getDate()).substr(-2);
			var mm = today.getMonth()+1;
			var monthNames = ["Januar", "Februar", "März", "April", "Mai", "Juni","Juli", "August", "September", "Oktober", "November", "Dezember"];
			var MM = monthNames[mm-1]; 
			var yyyy = today.getFullYear();
			var hour = today.getHours();
			var minutes = ("0" + today.getMinutes()).substr(-2);
			var seconds = ("0" + today.getSeconds()).substr(-2);
			var now = dd + ". " + MM + " " + yyyy+ " — ";
			$(this).prepend(now);  
		});
 	});
})(jQuery);	       
</script>
<?php
}
add_action('wp_footer', 'open_popup_and_show_date');

You still need to replace the month names with the equivalents in your local language
on var now you can insert like on my testpage the time

you see in the code there is only a : .one('click', is only will do that once – another click will do nothing on the same link

if you got this structure:
<span class="test pum-trigger" style="cursor: pointer;"><span class="lastClick"></span>Telmore gennemfører en prisændring på kunder</span>
we can have everytime you click a newly inserted date ( – but that would only be important if you got time in that date too )

See here some Info on date and javascript: https://www.w3schools.com/jsref/jsref_obj_date.asp

no – i’m participant as you so no private content for me – and with the other subject I did not mark them down. – Sorry

is it something like this:
https://webers-testseite.de/iconbox-with-popup/

na dann geb ich mal meinen Senf dazu: zunächst hast du ja die aktuellen Versionen : warum hast du dann jQuery Migrate noch aktiv?
Welche php Version hast du für die Seite bei deinem Provider gewählt?
Für mich hören sich dort einige Fehler dananch an, dass eventuell plugins nicht aktuell sind und mit jQuery 3.5.1 nicht kompatibel sind.

Hast du Einträge in der child-theme functions.php ? – Wenn ja – schau bitte ob dort benutzt wird:
$(window).load(function () {
oder
.click(function(){

beides muss ersetzt werden, da nicht mehr gülitig in jQuery 3.5.1
$(window).on("load", function () {
und
.on("click", function (){

PS:
Die einzige Fehlermeldung die hier in den Developer tools noch angezeigt wird ist die mit den entypo-fontello schriften.

Eventeull ersetzt du mal komplett den enfold Ordner via ftp. wie zB hier beschrieben: https://kriesi.at/support/topic/some-hints-and-advice-to-update-enfold/#post-1056107

nächste Idee: hast du in der htaccess Datei eventuell Extra Security Headers gesetzt?
ich habe zB auch teilweise Content-Security-Policy einträge. Dort muss man ganz schön aufpassen keine Quellen zu blockieren, die man benötigt für die Seite. Poste doch mal den Inhalt der htaccess datei.( bitte nutze den code tag beim einsetzen)

Or – by the way : you can use a filter to redefine the source for those images
you can do that box wise:
f.e. these widgets will use instead the square images ( 180px x 180px )

function my_avf_newsbox_image_size( $image_size, array $args, array $instance ){
  if( $args['widget_id'] == ( 'portfoliobox-3' || 'newsbox-2' || 'newsbox-4' ) ){
    $image_size = 'square';
  }
  return $image_size;
}
add_filter( 'avf_newsbox_image_size', 'my_avf_newsbox_image_size', 10, 3 );