node.js openssl error

trace.txt

Error: 140428615087936:error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca:../deps/openssl/openssl/ssl/s3_pkt.c:1234:SSL alert number 48 
    at CleartextStream._pusher (tls.js:674:24) 
    at SlabBuffer.use (tls.js:217:18) 
    at CleartextStream.CryptoStream._push (tls.js:501:33) 
    at SecurePair.cycle (tls.js:898:20) 
    at EncryptedStream.CryptoStream.write (tls.js:285:13) 
    at Socket.ondata (stream.js:38:26) 
    at Socket.EventEmitter.emit (events.js:96:17) 
    at TCP.onread (net.js:397:14)