SSL handshake failed

[testcaoy7]

I ran a server using certificate issued by Let's Encrypt. And I cannot connect to the server. I always got "SSL handshake failed with ..." error.

Server config:

{
    "run_type": "server",
    "local_addr": "0.0.0.0",
    "local_port": 443,
    "remote_addr": "127.0.0.1",
    "remote_port": 80,
    "password": ["12345678"],
    "log_level": 3,
    "ssl": {
        "cert": "/root/.acme.sh/example.com/fullchain.cer",
        "key": "/root/.acme.sh/example.com/example.com.key",
        "key_password": "",
        "cipher": "ECDHE-RSA-AES128-GCM-SHA256",
        "prefer_server_cipher": true,
        "alpn": ["http/1.1"],
        "reuse_session": true,
        "session_timeout": 300,
        "curves": "brainpoolP256r1",
        "sigalgs": "",
        "dhparam": ""
    }
}

Client config:

{
    "run_type": "client",
    "local_addr": "127.0.0.1",
    "local_port": 1082,
    "remote_addr": "example.com",
    "remote_port": 443,
    "password": ["12345678"],
    "log_level": 1,
    "ssl": {
        "verify": true,
        "verify_hostname": true,
        "cert": "LetsEncrypt-CA.txt",
        "cipher": "ECDHE-RSA-AES128-GCM-SHA256",
        "sni": "example.com",
        "alpn": ["http/1.1"],
        "reuse_session": true,
		"curves": "brainpoolP256r1",
		"sigalgs": ""
    }
}

[testcaoy7]

Solved. There is an issue in the certificate chain.
However, I do wish Trojan's log output can have more detail other than simple "SSL handshake failed with ..." message.