Maldon, You are a Tottalyy Genius!!!, again the green screen has appeared, but this time, after wait 3 minutes, the Welcome assistant appears.
Now we have Big sur installed.
I installed macosbig sur, even I installed apps and everything fine.
As final step, I change language to Spanish in System Preferences and copy the EFI Folder from usb installer to the SSD.
AND when I Try to boot, It shows the same gray-green screen, the Keyboard works, but still stuck at this screen .
What will be wrong?