emails not being sent

Hi

I’ve installed the plugin and everything is working great, except the generation of an email to the admin or client. I’ve tried with and without SMTP.

php.ini has the allow_url_fopen = 1 set.

Any advise would be much appreciated.

plugin can be seen here:
https://valledeleste.net/wp_valledeleste/?page_id=32

Many thanks

https://www.ads-software.com/plugins/booking-system/