Why do you have 53 volts on a 120 volt panel?

You have to backtrack and see where you have 120 volts. You likely have a loose or corroded wire connection. It is very dangerous working inside a panel so you should not do this if you are at all in doubt as to what you are doing.

Many houses use aluminum service entrance cable and the aluminum creeps in the connector over time. There is an Allen headed screw that tightens this connection, but it is obviously hot and you could get killed touching this with a metal Allen wrench. An electrician would either remove the meter which disconnects the panel or use a special insulated tool and gloves to tighten the connection.

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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

Before you do any work yourself,

on electrical circuits, equipment or appliances,

always use a test meter to ensure the circuit is, in fact, de-energized.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.