Hi,
Thanks for your patience, I have checked your site with my Android device and the LayerSlider background video plays correctly, I also tested by emulating mobile devices on Windows in Chrome, Firefox, & Edge, which also worked.
I tested on a Mac with Safari responsive design mode emulating iPhone devices, and this also showed the LayerSlider background video.
I also tested on browserstack.com with an actual iPhone Pro 13 v15.6 remotely and the LayerSlider background video plays correctly

I also tested on browserstack.com with an actual iPhone 8 v15.4 remotely and again the LayerSlider background video plays correctly

Please check your iPhone settings, by default Safari and iPhone do not want background videos to play on mobile devices, perhaps you have enabled a setting for low bandwidth video or some other setting, the iPhones I tested with on browserstack.com has the default settings and I can’t change them, but you see the video is playing, so please check your settings.
This doesn’t seem to be an issue with the LayerSlider.

Best regards,
Mike

Hi,
Thank you for your patience to move the arrows from the edge equally please try this css:

@media only screen and (max-width: 1024px) { 
#main .av-tab-above-content .av-tabsection-arrow {
    position: absolute;
    width: 90%;
    top: 30px;
    left: 5%;
}
}

expected results mobile:

expected results tablet:

To also change the color and size try adding this css:

@media only screen and (max-width: 1024px) { 
#main .av-tab-above-content .av-tabsection-arrow {
    position: absolute;
    width: 90%;
    top: 30px;
    left: 5%;
}
#main .avia-slideshow-arrows a:before {
	color: #bfdc1e;
	font-size: 20px;
    font-weight: 900;
}
}

for this result:

Best regards,
Mike

Hi,
Thank you for your patience and for the link to your site, please note that your css has padding: 10px 50px;

please change this to padding: 10px 0;
like this:

.header_color .phone-info {
background-color: #d90914;
color:#ffffff!important;
font: 15px Oswald;
font-weight: bold;
padding: 10px 0;
}

This is the expected results:

Best regards,
Mike

Hi,
Instead of using .appendTo(‘.single-product-summary .product_title’) try using .insertAfter(‘.single-product-summary .product_title’) this will add the Author & Curatore after the title instead of adding the Author & Curatore to the title. For example:

function add_autore_and_curatore_attributes_after_title() { ?>
  <script>
window.addEventListener('DOMContentLoaded', function() {
(function($){
  $('.shop_attributes .woocommerce-product-attributes-item--attribute_pa_autore').each(function() {
     $(this).clone().wrapInner('<p class="pa-autore"/>').children(0).unwrap().insertAfter('.single-product-summary .product_title').css({'margin':'0'});
     $('.pa-autore .woocommerce-product-attributes-item__label').wrapInner('<p class="autore-label"/>').children(0).unwrap().css({'display':'inline-block','margin':'0'});
     $('.pa-autore .woocommerce-product-attributes-item__value').wrapInner('<p class="autore-value"/>').children(0).unwrap().css({'display':'inline-block','margin':'0'});
     $('.pa-autore .autore-value p').css({'margin':'0'});
  });
  $('.shop_attributes .woocommerce-product-attributes-item--attribute_pa_curatore').each(function() {
     $(this).clone().wrapInner('<p class="pa-curatore"/>').children(0).unwrap().insertAfter('.single-product-summary .product_title').css({'margin':'0'});
     $('.pa-curatore .woocommerce-product-attributes-item__label').wrapInner('<p class="curatore-label"/>').children(0).unwrap().css({'display':'inline-block','margin':'0'});
     $('.pa-curatore .woocommerce-product-attributes-item__value').wrapInner('<p class="curatore-value"/>').children(0).unwrap().css({'display':'inline-block','margin':'0'});
     $('.pa-curatore .curatore-value p').css({'margin':'0'});
  });
})(jQuery);
});
</script>
  <?php
}
add_action('wp_footer', 'add_autore_and_curatore_attributes_after_title');

I tested on the pages linked below and works with:
Author & Curatore no product info
Author & Curatore with product info
Curatore only
Author only

Best regards,
Mike

Hey Gerry Granshaw,
Typically you would login to your support account and open a new thread. But I see that your account is from 2016 so your support probably needs to be renewed, please go to your Envato account and renew your support.
Your theme license is forever, but typically the support period is between 6mos to a year depending on what you purchased originally.
You could check our fullwidth easy slider documentation, or search our fourm as typically solutions are found in older threads.

Best regards,
Mike

Hi,
This looks like it’s from your iThemes Security log, I don’t see anything helpful in it.
Try checking your webhost server error log, if you are not sure where to find it ask your webhost for assistance.
Also please try enabling WP_DEBUG, please see these installations.

Best regards,
Mike

Hi,
Glad Rikard could help, if you have any further questions please create a new thread and we will gladly try to help you. Thank you for using Enfold.

Best regards,
Mike

Hi,
Glad Rikard could help, if you have any further questions please create a new thread and we will gladly try to help you. Thank you for using Enfold.

Best regards,
Mike

Hi,
Glad Yigit could help, if you have any further questions please create a new thread and we will gladly try to help you. Thank you for using Enfold.

Best regards,
Mike

Hi,
Thanks for the feedback, I tried re-uploading your theme but that didn’t help, please check your server error log for any errors, I have not seen this before so I have asked the rest of the team for input.

Best regards,
Mike

Hi,
Thanks, try replacing the precious solution with this this one at the end of your child theme functions.php file in Appearance ▸ Editor:

function custom_script_pa_autore_and_pa_curatore() { ?>
  <script>
window.addEventListener('DOMContentLoaded', function() {
(function($){
  $('.shop_attributes .woocommerce-product-attributes-item--attribute_pa_autore').each(function() {
     $(this).clone().wrapInner('<p class="pa-autore"/>').children(0).unwrap().appendTo('.woocommerce-product-details__short-description').css({'margin':'0'});
     $('.pa-autore .woocommerce-product-attributes-item__label').wrapInner('<p class="autore-label"/>').children(0).unwrap().css({'display':'inline-block','margin':'0'});
     $('.pa-autore .woocommerce-product-attributes-item__value').wrapInner('<p class="autore-value"/>').children(0).unwrap().css({'display':'inline-block','margin':'0'});
     $('.pa-autore .autore-value p').css({'margin':'0'});
  });
  $('.shop_attributes .woocommerce-product-attributes-item--attribute_pa_curatore').each(function() {
     $(this).clone().wrapInner('<p class="pa-curatore"/>').children(0).unwrap().appendTo('.woocommerce-product-details__short-description').css({'margin':'0'});
     $('.pa-curatore .woocommerce-product-attributes-item__label').wrapInner('<p class="curatore-label"/>').children(0).unwrap().css({'display':'inline-block','margin':'0'});
     $('.pa-curatore .woocommerce-product-attributes-item__value').wrapInner('<p class="curatore-value"/>').children(0).unwrap().css({'display':'inline-block','margin':'0'});
     $('.pa-curatore .curatore-value p').css({'margin':'0'});
  });
})(jQuery);
});
</script>
  <?php
}
add_action('wp_footer', 'custom_script_pa_autore_and_pa_curatore');

and use this css:

.pa-autore > .autore-label:after {
    content: ": "
}
.pa-curatore > .curatore-label:after {
    content: ": "
}

for this result:

Best regards,
Mike

Hi,
Please update the live site as there is no attribute Curator, I assume the attribute class will be .woocommerce-product-attributes-item–attribute_pa_curator but I need to see it to test a new script.

Best regards,
Mike

Hi,
Glad we were able to help, if you have any further questions please create a new thread and we will gladly try to help you. Thank you for using Enfold.

Best regards,
Mike

Hi,
Do you mean the FB icon? This is hidden by default on mobile to save room in the header, try adding this css to your Enfold Theme Options ▸ General Styling ▸ Quick CSS field:

@media only screen and (max-width: 479px) {
.responsive #top #wrap_all #header .social_bookmarks, .responsive #top #wrap_all #main .av-logo-container .social_bookmarks {
    display: block;
}
}

Best regards,
Mike

Hi,
Thanks for the login, I see that none of your pages are displaying either logged in or out, same with your posts.
Please try disabling all of your plugins including the iThemes Security Pro plugins and leave them disabled, except the “Tijdelijke login zonder wachtwoord” so we can still login.
Then try re-installing WordPress to ensure that none of the core WordPress files are damaged, you can easily do this at WordPress Updates:

I have not seen this before.

Best regards,
Mike