btw: to set a different source image for the newsbox / portfoliobox you can add that snippet to child-theme functions.php:
( you have to look what index your widgets get )

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 );

now for the example above you can now enlarge the thumbnail via quick css:

.news-thumb,
.news-thumb img {
  width: 100px;
  height: 100px;
}

see: https://enfold.webers-webdesign.de/impressum/ at the footer widgets

everything is right – little hint – place a video alb element outside of that with the link to your youtube video. On Content – you can click “Download Video Thumbnail” – this image will be saved in the media library.
After that – you can get rid of that “helper” video alb element – but now you can insert this thumbnail inside the toggle content.

Use Duplicator Plugin. Even the free Version is powerful enough to migrate that webseite. After installation you can Revalidate or remove the token, and insert a different one.

Maybe off topic – but you mentioned above the RestApi
which in my opinion is a security risk anyway.
With it you can e.g. read all usernames. Which is half of a bruteforce attack.
Insert to your Browser :

https://your-domain-url/wp-json/wp/v2/users

and replace “your-domain-url” for your domain

so many people disable this RestApi completely – or like me only for logged out users and only the security relevant things
this goes into the child theme functions.php

/**
 * REST-API Filter entfernt wichtige Informationen fuer den Zugriff von Aussen
 * @link https://developer.wordpress.org/rest-api/reference/ REST-API Referenz
 */
add_filter('rest_endpoints', function ($endpoints) {  
	if ( ! is_user_logged_in() ) {
		$endpoints_to_remove = array(
		'users',	/* removes the users from the data */
		'settings',	/* removes the website settings from the data */
		'posts',	/* removes the post content from the data */
		'pages',	/* removes the page content from the data */  
		);
		foreach ($endpoints_to_remove as $endpoint) {
			$base_endpoint = "/wp/v2/{$endpoint}";
			foreach ($endpoints as $maybe_endpoint => $object) {
				if (strpos($maybe_endpoint, $base_endpoint) !== false) {
					unset($endpoints[$maybe_endpoint]);
				}
			}
		}
		return $endpoints;
	}    
});

Header – Extra Elements – Header Secondary Menu

I’m not sure if the colored settings will preserve there – but you can style them manually via quick css

haha – sorry for the font colors in a text-block ( tiny-mce ) this is not a full solution – i will have a look to add there an additional row …

not as easy as one two three – but if you like :
this comes to child-theme functions.php:

// Custom theme colors ( max 8 - notation without #  but a name seems to be mandatory )
$avia_custom_colors = array(
	'14bed2' => __( 'Primary blue', 'avia' ),
	'cadd69' => __( 'Primary green', 'avia' ),
	'70736f' => __( 'Primary gray', 'avia' ),
	'f26722' => __( 'Secondary orange', 'avia' ),
	'fdbb4a' => __( 'Secondary yellow', 'avia' ),
);

/**
 * Customize TinyMCE text color picker.
 * Filter: tiny_mce_before_init
 *
 * @param  array $init Initialiation array for TinyMCE
 * @return array
 */
function avia_set_colors_tinymce( $init ) {
	global $avia_custom_colors;

	/**
	 * Array to hold custom colors.
	 * Note that this not an associative array.
	 * Each color takes up two array elements.
	 */
	$colors_custom = array();
	foreach ( $avia_custom_colors as $color => $label ) {
		$colors_custom[] = $color;
		$colors_custom[] = $label;
	}

	/**
	 * I like the custom colors to take up the entire
	 * first row. However, if there are only a few colors,
	 * the color picker becomes too narrow and tall,
	 * so this adds blank squares to help stretch it out.
	 * This block can be removed if you don't want placeholders
	 */
	$_num_of_cols = 8;
	while ( count( $colors_custom ) / 2 < $_num_of_cols ) {
		$colors_custom[] = '_hide';
		$colors_custom[] = '';
	}
	
	/**
	 * Original colors.
	 * @see wp-includes/js/timemce/langs/wp-langs-en.js
	 */
	$colors_original = array( '000000', 'Black', '993300', 'Burnt orange', '333300', 'Dark olive', '003300', 'Dark green', '003366', 'Dark azure', '000080', 'Navy Blue', '333399', 'Indigo', '333333', 'Very dark gray', '800000', 'Maroon', 'FF6600', 'Orange', '808000', 'Olive', '008000', 'Green', '008080', 'Teal', '0000FF', 'Blue', '666699', 'Grayish blue', '808080', 'Gray', 'FF0000', 'Red', 'FF9900', 'Amber', '99CC00', 'Yellow green', '339966', 'Sea green', '33CCCC', 'Turquoise', '3366FF', 'Royal blue', '800080', 'Purple', '999999', 'Medium gray', 'FF00FF', 'Magenta', 'FFCC00', 'Gold', 'FFFF00', 'Yellow', '00FF00', 'Lime', '00FFFF', 'Aqua', '00CCFF', 'Sky blue', '993366', 'Brown', 'C0C0C0', 'Silver', 'FF99CC', 'Pink', 'FFCC99', 'Peach', 'FFFF99', 'Light yellow', 'CCFFCC', 'Pale green', 'CCFFFF', 'Pale cyan', '99CCFF', 'Light sky blue', 'CC99FF', 'Plum', 'FFFFFF', 'White', );
	
	// Create complete colors array with custom and original colors
	$colors = array_merge( $colors_custom, $colors_original );

	/**
	 * Begin textcolor parameters for TinyMCE plugin.
	 * @link https://www.tinymce.com/docs/plugins/textcolor/
	 */
	$init['textcolor_map'] 	= json_encode( $colors );

	/**
	 * Colors are displayed in a grid of columns and rows.
	 * Set the number of columns to match the number of custom colors,
	 * this way our colors make up the first row so they're easier to identify quickly.
	 * Halve the count since each color has two array entries.
	 */
	$init['textcolor_cols'] = count( $colors_custom ) / 2;
	
	// Set number of rows
	$init['textcolor_rows'] = ceil( ( ( count( $colors ) / 2 ) + 1 ) / $init['textcolor_cols'] );
	
	return $init;
}
add_filter( 'tiny_mce_before_init', 'avia_set_colors_tinymce' );

/**
 * Adjust TinyMCE custom color styling grid
 * Action: admin_head
 */
function avia_style_custom_colors_timymce () { ?>
	<style type="text/css">
		/* Add padding after first row */
		.mce-colorbutton-grid tr:first-of-type td {
			padding-bottom: 10px;
		}

		/* Hide the filler blocks */
		.mce-colorbutton-grid tr:first-of-type td div[data-mce-color="#_hide"] {
			visibility: hidden;
		}

		/* Fix spacing issue with the "transparent" block */
		.mce-colorbtn-trans div {
		    line-height: 11px !important;
		}
	</style>
<?php }
add_action( 'admin_head', 'avia_style_custom_colors_timymce' );

/**
 * Customize Iris color picker.
 * Inspired by @link https://wordpress.org/plugins/iris-color-picker-enhancer/
 * Action: admin_footer, customize_controls_print_footer_scripts
 */
function avia_set_colors_iris() {
	global $avia_custom_colors;
	
	if ( wp_script_is( 'wp-color-picker', 'enqueued' ) ) : ?>
		<script type="text/javascript">
			jQuery.wp.wpColorPicker.prototype.options = {
				palettes: [
					<?php foreach ( array_keys( $avia_custom_colors ) as $color ) {
						echo "'#$color',";
					} ?>
				]
			};
		</script>
	<?php endif;
}
add_action( 'admin_footer', 'avia_set_colors_iris' );
add_action( 'customize_controls_print_footer_scripts', 'avia_set_colors_iris' );

Sorry for the Intermission: Unfortunately, your other topic is already closed. Link
Of course Enfold has a solution for this – under : Layout Builder – Custom Color Palette

is there a page we can see the issue?

can you please answer the questions above.

Not for this – I didn’t know you could set gradients on sharp transitions for a long time.
you are welcome! I am always happy to help

You can find several posts using the search function on how to remove this notice in the footer.
add to your own notice there : [nolink]

You can even find it in the documentation ( link ) . If you have a little patience, you will be answered even here friendly and in compliance with netiquette. Even people who have no profit from the theme here – nice and friendly participants like me answer you comprehensively and quickly.
You can even rewrite this note that is automatically inserted there to your own settings.
Here is an answer from my side that is not too long ago. : Link
I wish you another beautiful day. ;)

The will is man’s heavenly kingdom.

you can do that by child-theme functions.php snippet:

function replace_tags_with_tags(){
?>
<script>
  (function($) {       
      function replaceElementTag(targetSelector, newTagString) {
        $(targetSelector).each(function(){
          var newElem = $(newTagString, {html: $(this).html()});
          $.each(this.attributes, function() {
            newElem.attr(this.name, this.value);
          });
          $(this).replaceWith(newElem);
        });
      }
      replaceElementTag('.avia-button-wrap .avia-button.avia-size-x-large .avia_iconbox_title', '<h4></h4>');  
  }(jQuery)); 
</script>
<?php
}
add_action('wp_footer', 'replace_tags_with_tags');

you see how it works: all extra large buttons text will be surrounded by h4 tags then.
to show these h-tags besides the icons – as before you had to set:

#top .avia-button .avia_iconbox_title {
  display: inline-block;
}

and btw: anchors are inline elements – you can wrap other inline elements ( without other anchor tags ) – so if you set the h-tag to show inline-block this is even html valide ;)

if you only want to replace specific button text : give a custom class to that button – this class will be on the wrapper – so :

function replace_tags_with_tags(){
?>
<script>
  (function($) {       
      function replaceElementTag(targetSelector, newTagString) {
        $(targetSelector).each(function(){
          var newElem = $(newTagString, {html: $(this).html()});
          $.each(this.attributes, function() {
            newElem.attr(this.name, this.value);
          });
          $(this).replaceWith(newElem);
        });
      }
      // f.e.: custom-class expresses the h-tag you like to get
      replaceElementTag('.avia-button-wrap.is-h1 .avia-button .avia_iconbox_title', '<h1></h1>');  
      replaceElementTag('.avia-button-wrap.is-h2 .avia-button .avia_iconbox_title', '<h2></h2>');  
      replaceElementTag('.avia-button-wrap.is-h3 .avia-button .avia_iconbox_title', '<h3></h3>');  
      replaceElementTag('.avia-button-wrap.is-h4 .avia-button .avia_iconbox_title', '<h4></h4>');  
  }(jQuery)); 
</script>
<?php
}
add_action('wp_footer', 'replace_tags_with_tags');

Or is it the other way round: that a headline tag looks like a button?

or redefine the backlink by this in your child-theme functions.php:

/**  new backlink in copyright insertion*/
function new_nolink(){
$kriesi_at_backlink = " - <a href='https://your-link'>your link text</a>";
return $kriesi_at_backlink;
}
add_filter("kriesi_backlink","new_nolink");

Of course, you then had to remove the [nolink] from the copyright input field.

_____________

different way to write:

function my_own_backlink($link){
  $no = "rel='nofollow'";
  $target = "_blank";
  $backlink_url = 'Backlink URL';
  $theme_string = 'Custom Backlink Text'; 
  $link = " - <a {$no} href='{$backlink_url}' target='{$target}'>{$theme_string}</a>";
  return $link;
}
add_filter( 'kriesi_backlink', 'my_own_backlink', 10, 1);

why don’t you solve it by just css – and make that “separator” part of the footer itself?
and if this separator is a big one ( f.e. height 50px ) – just add more padding on top:

#footer {
  background-size: 100% 50px;
  background-position: 0px 0px;
  background-repeat: no-repeat;
  background-image: linear-gradient(180deg, green 0%, green 25%, blue 25%, blue 50%, purple 50%, purple 75%, orange 75%, orange 100%);
  padding: 65px 0 30px 0;
}

Big advantage of that way: if you have a curtain effect on footer – this will be o.k. because no extra calculation is needed – these lines are part of the footer height.

____________________
PS:
But if you like to make it your way:
Enfold got a hook for that: ava_before_footer

add_action('ava_before_footer', function() {
echo '<div id="de-footer-bar">
        <div class="de-colour green"></div>
        <div class="de-colour blue"></div>
        <div class="de-colour purple"></div>
        <div class="de-colour orange"></div>
    </div>';
});

can you please make a screenshot – where the extra H3 tag is – or tell us the content of that heading to find that place.