Unhandled rejection promise

[jbarr21]

saving values/strings.xml
making request -- GET - https://spreadsheets.google.com/feeds/worksheets/0Av3IECowXxw9dGN1bnc4aEZxYzF2N3ZORmVpZHdqM2c/public/values
saving values-es/strings.xml
Unhandled rejected promise: Error: 140735097291136:error:0607907F:digital envelope routines:EVP_PKEY_get1_RSA:expecting an rsa key:../deps/openssl/openssl/crypto/evp/p_lib.c:288:

at CleartextStream._pusher (tls.js:656:24)
at SlabBuffer.use (tls.js:199:18)
at CleartextStream.CryptoStream._push (tls.js:483:33)
at SecurePair.cycle (tls.js:880:20)
at EncryptedStream.CryptoStream.write (tls.js:267:13)
at Socket.ondata (stream.js:38:26)
at Socket.EventEmitter.emit (events.js:96:17)
at TCP.onread (net.js:397:14)

Unhandled rejected promise: Error: 140735097291136:error:0607907F:digital envelope routines:EVP_PKEY_get1_RSA:expecting an rsa key:../deps/openssl/openssl/crypto/evp/p_lib.c:288:

at CleartextStream._pusher (tls.js:656:24)
at SlabBuffer.use (tls.js:199:18)
at CleartextStream.CryptoStream._push (tls.js:483:33)
at SecurePair.cycle (tls.js:880:20)
at EncryptedStream.CryptoStream.write (tls.js:267:13)
at Socket.ondata (stream.js:38:26)
at Socket.EventEmitter.emit (events.js:96:17)
at TCP.onread (net.js:397:14)