That's weird, errors are you getting? I'll try to work on it on my end but any detailed information would be helpful.....
I've made some modifications so it should be working now, if it still has issues I'll contact support.
It seems the problem is with my PayPal account, I might have gotten limited to only sending since it's a fairly new one so I guess I'll have to look into other payment methods until I can resolve this. I'll probably have to disable the reward system until further notice, sorry for the disappointment.