I have i problem check in this night in my "Reserve Now" Botton

Hola!

Whe i try to Reserve the night like tonight for example check in 16/01/18, check out 17/01/18 and push the botton “RESERVAR AHORA” the botton do not do nothing, just when reserve for example the date check in 17/01/18 and check out 18/01/18.

link: https://hotelvillanueva.com.mx/habitaciones/estandar-king/

and also se this warning: Warning: Invalid argument supplied for foreach() in /home4/hotelvil/public_html/wp-includes/class-wp-list-util.php on line 153

Thank you!