This can have several reasons:
Your friend doesn’t have enough Steem reputation (must be >= 30)
You weren’t the first who sent him Bytes and another user got the reward
Your friend tried to attest multiple times
The current network delay (in this case simply wait and your Bytes will come in)
This can have several reasons:
Your friend doesn’t have enough Steem reputation (must be >= 30)
You weren’t the first who sent him Bytes and another user got the reward
Your friend tried to attest multiple times
The current network delay (in this case simply wait and your Bytes will come in)