Dear @tspallek
Because this thread is two years old, could you please refine what you are having trouble with?
"Customize" page is completely empty"
Do any of the troubleshooting tips help you:
https://laytheme.com/troubleshooting.html#customizer-does-not-show-up
Some common debugging tests:
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 are de-activated to see if this resolves the issue.
Talk soon & best wishes ✨
Richard
