Thanks a lot for all your help Ismael.
Unfortunately I still can’t get it working like before, even though I replaced the line like you metioned. Following is the code in functions.php

add_action('wp_footer', 'ava_auto_click');
function ava_auto_click() {
	if(!$_GET["psort"]) return;	
?>
		<script>
        (function($){	
            $(window).on("load", function() {
<?php echo '$(".'. $_GET["psort"] .'_sort_button").trigger("click");'; ?>
            });	
        })(jQuery);
        </script>
<?php
}

I guess and hope we are almost there..
Kind regards, Chris

Of course (see below)
When I first load the page and beginn scrolling down from the top of the page, the first two masonry load correctly, but the following masonry galleries (3 4 5) don’t load until I scroll to the very bottom of the page and scroll up again. Something additional I took note right now: if I reload the page as one of these not loaded galleries (whitespace) potentially are in the viewfield, all of them almost load properly on reload the page. But I just cant tell my customers to just scroll down and up again or reload the page if products dont show up :-)
Kind regards, Chris

I had already contacted my hosting provider and the support didn’t tell me anything about blocked memory limit. They even increased it to 512 MB for me, which obviously didn’t help either. I think some plugin completely messed up my database or I don’t know. Anyway, my solution after trying to fix it in each and every possible way which didn’t work out for over one week:
1. Screenshots of the WP and Enfold Options
2. Export Pages and Media
3. Delete all Plugins, Databases, Theme and finally WordPress
4. Completely fresh install of WordPress
5. Import Pages and Media
Took me about 4 hours. Of course this isn’t the best solution, but if I would have done it like this at the beginning would have saved me one week. Just for others to consider this option, if they cant solve their suddenly occuring bad gateway the “normal way”.

Best regards,
Chris

Hi Nikko, thanks a lot for the fast reply.
In the Private Content you find the URL for temporary login. Hope we can solve this. I also set up a temp FTP access for you. Just in case.
Best regards,
Chris