The endpoint you're trying to access doesn't support any of the protocols you're trying to use (SSL3, TLS 1.0, TLS 1.1, or TLS 1.2). At a guess, it may only support TLS 1.3, since the others have security vulnerabilities and are often disabled.
Rather than explicitly defining the protocols to use, the recommendation is to use any protocol enabled in the OS. If you need TLS 1.3 support, you'll need to target .NET Framework 4.8.
Transport Layer Security (TLS) best practices with the .NET Framework - .NET Framework | Microsoft Learn