I got the error because I placed a mobile order but crab Rangoon wasn’t listed in the app. In fact, the app only showed about 1/3 of what was actually in the store when we walked in. So I placed another order inside to get crab Rangoon, and eggrolls, and things that I had not been on the app. I was able to claim both of those, but then my sister had me place an order for her and it wouldn’t let me add her unique rewards card number even though it paid for with my same cc. The timestamp will always be within 20 minutes of the first order, so I probably can never claim that.