Cannot buy PDF Architect Pro

I just can't buy / renew PDF Architect Pro. There is no way to renew the licence because the product just disappeared from my account. And the button SELECT PROFESIONNAL on the website just open up a blank page. Been like that for a few days.

Tried Edge, Firefox, Chrome, none is working.

It's finally working back again. The buy page was offline for 4-5 days, maybe even more.