I completed the challenges and I don't think I received either reward. Unsure what the weekly reward even is as well so maybe I'm not looking in the right places for it?
Some info FWIW,
Nothing new in my KF2/Steam inventory, all challenges themselves have checkmarks for completing them, clicking on the rewards themselves is unresponsive, restarted KF2 a few times to no avail, did the new map on solo/hard/long and finished the challenge for winning the map last, died on the first try, received a Summer Sideshow Price ticket for the first attempt, got the achievement for item collection on first attempt, got the achievement for beating tragic kingdom on hard on second attempt, matchmaker found a paris/hard/medium game and we won against Hans, and didn't receive the normal daily item drop on any of the three games played.
Perhaps something in those details matches with others that didn't get the rewards and conflicts with others that did get the rewards?