This code return the images of logo and thumbnails path instead of URL that isn't supported by some server

functions.php

<?php

if( defined('YITH_YWRAQ_PREMIUM') ){

	add_filter( 'ywraq_pdf_logo', 'ywraq_change_pdf_logo' );
	function ywraq_change_pdf_logo( $logo ) {

		$logo_id = get_option( 'ywraq_pdf_logo-yith-attachment-id' );

		$logo = get_attached_file( $logo_id );

		return $logo;
	}


	add_filter( 'ywraq_pdf_product_thumbnail', 'ywraq_change_pdf_product_thumbnail', 10 , 2 );
	function ywraq_change_pdf_product_thumbnail( $url, $id ){

		if( $id ){
			$url = get_attached_file( $id );
		}

		return $url;
	}
	
}