Hi!
After some research, I was able to solve the problem. The error is due to some libraries (libgfortran3) are missing (maybe in the installation of the OS or SNAP can’t find them).
I install the library libgfortran3 doing the next steps:
sudo dpkg --configure -a
sudo apt-get install gcc
sudo apt-get -f install libgfortran3
After that, I can make the processing in SNAP without problems
Regards