Cant Load Instructions

Hello,
I got an invite but when I click the instruction ( https://insidersupport.halowaypoint.com/hc/en-us/articles/360041783631-Halo-2-Flight-Install-Instructions-Microsoft-Store )

It returns a page does not exist message.

So far i’ve cleared my cookies and tried an incognito browser.

I’ve also already downloaded Xbox insider.

Someone, please help.

Thanks