Dear @raquelpeixoto
Some first steps of debugging :)
Wordpress, Lay Theme & Laytheme's Addons are all up to date ?
Any Custom CSS or JS that may interfere is temporarily removed.
Any third-party plugins de-activated to see if this resolves the issue.
If using a WordPress Cache plugin, disable it or clear your cache.
License key not activated - (in website blank situations or button not available)
If your WordPress Dashboard shows a warning "PHP Update required” please update your PHP version in your webhost control panel.
Additionally please take a look at https://laytheme.com/troubleshooting.html for known problems.
Please let me know if any apply to you or solve the issue :)
Talk soon & Best wishes
Richard