Ok. Finally found it. Looks OK?
That payment just doesn’t want to go through. 
Discussion
Yep you have enough capacity for sure. This is odd.
Ok. Here is the chain of events.
First you see 3 notifications for some reason. Then it shows the mailbox. Then pending transaction. Then error when you try and redeem it… ideas? 
Only guess is that the channel is not online when you try to redeem. I would confirm it is online before trying again.