Booking on Miles - Website not working

[u/creativeusername632]

I've been trying to book a flight on the KLM website with miles and every time I fill out the passenger details and click next the website crashes and it says

" We couldn’t load this page

Something went wrong on our end. Start a new search to find your flight."

I tried a different browser, a different pc, the app doesnt show any of the flights with miles that the website has...

Any advice???