Unable to unlock anything: Seasons or exchange

MCC on PC.
For over a month now i have been unable to unlock anything from the season menu or the new exchange they added, after a long wait it always responds with “The tier reward unlock failed. Please try again later.” When this started happening it also takes a very long time to connect to the servers before i can access any online halo content. This hasn’t always been the case, ive had the MCC day one and like i said this only started over a month ago. Sometimes if i try unlocking an item but get pulled into a multiplayer match it will partially work but usually not.
I dont have my xbox account linked up to my steam account and i dont know how to link my steam account to this website.

Ive looked everywhere for a bug fix but i cant find anyone talking about a similar issue.
I have tried reinstalling the entire MCC as well as all of Steam and the issue has not gone away.

As this appears to be an issue with your game, we recommend heading over to https://aka.ms/HaloSupport for further assistance. Please review the latest known issues and submit a ticket if your issue is not listed.

Thanks!

Having the same problem. Was also working perfectly for me a few days ago, now every time regardless of the item I choose it loads for a bit and same message, “Unlock failed - try again later”

Submitted a ticket tho, so hoping support can help troubleshoot.