Problem of getting url from ACF using XYZ PHP SNIPPET

Question

I have Created a text Field (ACF) that contains an URL and would like to re-use this URL for href link, but the code below doesnt work for me:

<?php
function resource_download_button() { 
 
$url = get_field('resource-download'); 
$button = '<a class="vc_general vc_btn3 vc_btn3-size-md vc_btn3-shape-rounded vc_btn3-style-modern vc_btn3-color-danger" href="'.$url.'" target="_new">Download</a>';

return $button;
}

echo resource_download_button();

?>

Could you help please to solve this issue please ?

I tried to change the field type to URL and Link but the problem wasn't solved