This threw me off yesterday. I zapped a lot of people only to notice after a good while that non went through. 

After opening NWC i noticed that my budget was maxed out, alright maybe my fault. Kept trying to set up a new connection, it kept reverting to the old maxed out one. 

Finally i uninstalled/installed the app again, and now it seems to be working again. 

At least it is if you got my zap. 😅