Genuine Arduino UNO and NANO work with the same CH340G driver. The UNO board works correctly but NANO is recognized, a port is assigned to it but the program does not load. Any suggestions?
to my knowledge Genuine Arduino don't use the CH340G driver at all....
for the nano, try "old boot loader" option
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Nothing wrong with your knowledge 
Try the old boot loader. That solution appears here about every week and generally it solves the problem.
I already tried but it doesn't work
What is the condition of the TX and RX lights. Also what happens if you enable the serial monitor?
Which version of the IDE do you use?
Which operating system?
Enable verbose output during upload and verbose output during compilation. The latter should actually be disabled but we need to make sure that you have the correct board selected (sorry, seeing is believing 
).
Copy the full output here; please don't forget to use code tags when posting the message. It might help others to help you.
I have changed IDE version to 1.8.18 and have used the old boot loader.
Now everything works.
Thank you so much
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