Muffin Builder - Content for translation is encoded

Overview of the issue

When you try to translate content built with BeTheme’s Muffin Builder, the translated content is not displayed in front-end, or the content is encoded as displayed on the screenshot below:

Workaround

Please, be sure to make a full backup of your site before proceeding.

1. Update to the last version of Betheme
2. Go to Betheme > Theme Options > Global > Advanced > Muffin Builder data storage and select the Serialized | Readable format, required by some plugins option
3. Open the wp-content/themes/betheme/functions/theme-functions.php file and search for the snippet below:

   /*
    * WPML | Workaround for compsupp-5901
    */
   
   function mfn_wpml_encode_custom_field( $custom_field_val, $custom_field_name ) {
     if ( $custom_field_name === 'mfn-page-items' ) {
   	  $custom_field_val = maybe_unserialize( base64_decode($custom_field_val) );
   	}
   	return $custom_field_val;
   }
   add_filter( 'wpml_encode_custom_field', 'mfn_wpml_encode_custom_field', 10, 2 );
   
   function mfn_wpml_decode_custom_field( $custom_field_val, $custom_field_name ) {
   	if ( $custom_field_name === 'mfn-page-items' ) {
   		$custom_field_val = base64_encode( serialize($custom_field_val) );
   	}
   	return $custom_field_val;
   }
   add_filter( 'wpml_decode_custom_field', 'mfn_wpml_decode_custom_field', 10, 2 );
   

4. Replace it with the snippet below:

   
   /*
    * WPML | Workaround for compsupp-5901
    */
   function mfn_wpml_encode_custom_field( $custom_field_val, $custom_field_name ) {
       if ( $custom_field_name === 'mfn-page-items' ) {
           $custom_field_val = base64_encode( serialize($custom_field_val) );
       }
       return $custom_field_val;	
   }
   add_filter( 'wpml_encode_custom_field', 'mfn_wpml_encode_custom_field', 10, 2 );
   
   function mfn_wpml_decode_custom_field( $custom_field_val, $custom_field_name ) {
   	if ( $custom_field_name === 'mfn-page-items' && is_string($custom_field_val) ) {
   		$custom_field_val = maybe_unserialize( base64_decode($custom_field_val) );
   	}
   	return $custom_field_val;
   }
   add_filter( 'wpml_decode_custom_field', 'mfn_wpml_decode_custom_field', 10, 2 );
   

5. If you have already started to translate your pages, edit the original page and save.
6. Update the translation and the content should be available now.