sun.security.provider.certpath.SunCertPathBuilderException when update Akka HTTP to 10.1.14 to 10.2.4

Akka Libraries Akka HTTP
,
1

I’m updating Akka HTTP from 10.1.14 to 10.2.4. Unfortunately, I’m having an exception that before was not present.

PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

What I changed is the API deprecated, in particular for HttpsClient this :

http.setDefaultClientHttpsContext(newHttpsConnectionContext(sslContext.get))
...
...
def newHttpsConnectionContext(sslContext: SSLContext): HttpsConnectionContext = {
    val sslParameters: Option[SSLParameters] = None
    val sslConnectionContext: HttpsConnectionContext = ConnectionContext.https(
        sslContext,
        None,
        Some(SSL_CIPHER_SUITES.toIndexedSeq),
        Some(SSL_PROTOCOLS.toIndexedSeq),
        clientAuth,
        sslParameters
        )
}

into this :

http.setDefaultClientHttpsContext(newHttpsConnectionContext(sslContext.get))
...
...
def newHttpsConnectionContext(sslContext: SSLContext): HttpsConnectionContext = {
    val sslConnectionContext: HttpsConnectionContext = ConnectionContext.httpsClient(
    sslContext
    )
}

I would specify that sslContext variable , created previously trough a routine, is set in this way:

sslContext.init(km, tm, new SecureRandom())

where km and tm are custom KeyManager and TrustManager created at runtime starting from a certificate and a private key in pem format.

Could someone help me?