MLAT problems

Hello community my name is Juan Antonio Hernandez and I have been with my equipment installed for several years and it has been approximately two months since the MLAT does not work
the insidence is as follows
this feeder is not being used for multilateration because its timing information appears to be unreliable. This can be caused by te site location being incorret or because your Pi is running out of free CPU

my location is site 35024 LEMG
Malaga Andalucia
Spain
I would be very grateful if you could tell me what I can do to restore my MLAT
Thanks and health to all

Seems your 5V dc power supply unit is no more working ok. Try another power supply unit.

Also issue command top to RPi. It will show CPU usage in %