You found the snitch to find Cassie, the secret merchant, but she does not sell you any weapons or armor? Cassie Mendoza seems to have bugs this week!
After the Weekly Dealer Reset, everyone seems to be in the first moment as always. The offers of the traders are remixed and you visit the traders to buy new items.
Until you try to shop at Cassie!
If you find the snitch and then visit Cassie Mandoza you will be a bit confused. She does not offer any items at the moment, her inventory is empty and her timer is going crazy.
Where the mistake is We do not know at the moment, we hope that Ubisoft will quickly post a hotfix!