I closed the contract due to work done successfuly, but the last 50$ is still in remains funds. Maybe I forgot to release the last milestone? Anyway, how now is possibe for my freelancer to get this money after the contract is already closed?
Your freelancer was already paid for the 2 milestones that he completed for you. If you would like to send additional payments you can send it as a bonus payment.
To do this open the contract > click on the three dots > Give Bonus. Thank you.