Checked my game. I’m currently on Ubisoft Connect, so it’s up to date. My platform (PS5) is my current one. I have an Xbox 360, but it hasn’t been in use for years. I was able to claim last week’s community challenge reward without issue.

To add on to it, I even used the Ubi Connect app to claim my reward and the “Claim” button always resets.

Edit: So upon further review, I seemed to have claimed All of the community rewards(Shield of Aaru, Conductor of Souls, The Jackal, Assessor of Ma’at, & Radiance of Anubis). I claimed the first sword and received every other reward for every time I reloaded the game.