I have a question on which I set a bounty. No one answered and the bounty period has expired. I get a message on the question page asking me to award the bounty to someone within 23 hours. Who do I award it to? How do I award it? No one replied to the question so how is it possible to award it to anyone?
It's not possible to award it to anyone. If nobody answers within 23 hours, just let it expire. That's it. No harm done.