[solution] Error updating bootloader "it's not ZUNO G2 board connected"

[element]

The board functions normally. However, when updating the bootlader, the error "it's not ZUNO G2 board connected" and "Can't request board information" appears. Rescue modes do not help. It looks like a broken board but it is a firmware error. I bypassed this error by updating the bootlader first to the slightly older version 3.0.10 and then to version 3.0.12 beta.
Regards

PS: I didn't save which version I updated from

[PoltoS]

Was it solved?

[element]

Was it solved?

Yes. I made it myself. I have already solved the problem and here is the solution.