Dear @Sirkka-Ammann
This is unusual so i'm wondering in your situation if any of the following apply to you:
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.
Also within the 'console' im getting a 404 error - if you could take a look at the link and see if it relates to you please:
https://laytheme.com/troubleshooting.html#nothing-shows-up
Talk soon & best wishes :)
Sincerely
Richard