I have fix that in this way whit the help of another user post. Il the file called /wp-content/plugins/contact-form-7-recaptcha-extension/includes/CF7reCAPTCHA.class.php change this line (around 773 line)
function tag_pane( &$contact_form ) {
into this
function tag_pane( $contact_form ) {
and this line near the previous
<div id="cf7recaptcha-tg-pane" class="hidden">
into this
<div id="cf7recaptcha-tg-pane">
For me works correctly and i hope this edit help 🙂 (sorry for my english but i really hope this help)
