FlexApps.exe -s efin --accept 127.0.0.1 error.

[danielecentanni-bitrocketdev]

when i run FlexApps.exe -s efin --accept 127.0.0. , to simulate a SKIP_EarlyFinished attack, the following error comes up:

unhandled exception: System.Security.Cryptography.CryptographicException: cannot find the specified file.
in System.Security.Cryptography.CryptographicException.ThrowCryptographicException(Int32 hr)
in System.Security.Cryptography.X509Certificates.X509Utils._QueryCertFileType(String fileName)
in System.Security.Cryptography.X509Certificates.X509Certificate.LoadCertificateFromFile(String fileName, Object password, X509KeyStorageFlags keyStorageFlags)
in System.Security.Cryptography.X509Certificates.X509Certificate2..ctor(String fileName)
in FlexApps.Attack_SKIP_EarlyFinished.Attack_SKIP_EarlyFinished.server(String listening_address, FSharpOption1 port) in C:\Users\scomm\Source\Repos\mitls-flex\flex\FlexApps\Attack_SKIP_EarlyFinished.fs:riga 41 in FlexApps.Application.runRelease$cont@66(FSharpOption1 matchValue, Unit unitVar) in C:\Users\scomm\Source\Repos\mitls-flex\flex\FlexApps\Application.fs:riga 164
in FlexApps.Application.runRelease(IEnumerable`1 argv) in C:\Users\scomm\Source\Repos\mitls-flex\flex\FlexApps\Application.fs:riga 66
in FlexApps.Application.main(String[] argv) in C:\Users\scomm\Source\Repos\mitls-flex\flex\FlexApps\Application.fs:riga 206

I followed the README-SKIPdemo.txt file step by step until the error, I updated the certificates using the make pki.built command in the exact directory and installed all the dependencies that the project requires.