oops You're not authorized to access this page

When i try and look at the campaign challenges on this link ( https://support.halowaypoint.com/hc/en-us/articles/360043472231-Campaign-Challenges )
it just says:
oops
You’re not authorized to access this page

…Whats going on?

Likely the article has been taken down. I think that was only used in the lead up to challenges being released in game, so now you can check the game’s Challenge Hub to see what the latest challenges are