Hello,
your installation of .NET Framework is corrupted and you're missing one or more files. Please re-install the .NET Framework 4.5.2 or newer: https://www.microsoft.com/en-us/download/details.aspx?id=49981

Hello BIS Wizard
many thanks for your reply
I've installed the last available .NET Framework (4.6.1)
but I get again an error message and the application is not starting
the new log file is in the attachment

have a good day
Roberto

Hello musso,
this error is caused by corrupted machine-wide configuration files for .NET Framework, which installer probably didn't bother to modify :/

The .NET Framework installation contains a backup copy of that file, so it's possible to replace it manually. If you can start the command line as administrator, then run this command and it should be fixed (providing the backup copy is not corrupted):
xcopy /Y "%windir%\Microsoft.NET\Framework\v4.0.30319\Config\machine.config.default" "%windir%\Microsoft.NET\Framework\v4.0.30319\Config\machine.config"

Thank you BIS Wizard

I've done what you suggested me
now I get a different error message
the log file is in the attachment

thank you
best regards