Problem to understand an exception

[MauroG]

Sorry to bother you, but not finding a solution, I try to ask:

it is correct that if I write:
    
    
    let client = newHttpClient(sslContext = newContext(protVersion = 
protSSLv23, cipherList=CiphersIntermediate, ciphersuites=CiphersIntermediate))
    
    
    Run

I am setting to use the intermediate cipher suites?

The const CiphersIntermediate is present in ssl_config.

I compile the code as you said: -d:ssl -d:openssl10

The server is set to use TLS 1.2 and in the suite there is: 
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256

And in the Intermediate List there is this combination.