Error Jason

gistfile1.txt

Desktop/ERC20
└── web3@1.0.0-beta.37 



Using network 'ropsten'.

Running migration: 1_initial_migration.js
  Replacing Migrations...
  ... 0xcf49b50d20815f02646d7d4709c7d720a38812498d4ee663d7048ec5473bde9f
  Migrations: 0xc286dc7e0c151bbc0c5509f3b5e499193e37b422
Saving successful migration to network...
  ... 0x41f325c017f9746a3d3534695604a2d02e90ec91f6cb3f5000bb9f1e01b78f9a
Saving artifacts...
Running migration: 2_deploy_contracts.js

/usr/local/lib/node_modules/truffle/build/webpack:/~/web3/lib/web3/errors.js:38
        return new Error(message);
^
Error: Invalid JSON RPC response: undefined
    at Object.InvalidResponse (/usr/local/lib/node_modules/truffle/build/webpack:/~/web3/lib/web3/errors.js:38:1)
    at RequestManager.send (/usr/local/lib/node_modules/truffle/build/webpack:/~/web3/lib/web3/requestmanager.js:61:1)
    at Eth.send [as getBlock] (/usr/local/lib/node_modules/truffle/build/webpack:/~/web3/lib/web3/method.js:145:1)
    at module.exports (/Users/Edwin/Desktop/ERC20/migrations/2_deploy_contracts.js:5:34)
    at /usr/local/lib/node_modules/truffle/build/webpack:/~/truffle-migrate/index.js:82:1
    at /usr/local/lib/node_modules/truffle/build/webpack:/~/truffle-require/require.js:101:1
    at FSReqWrap.readFileAfterClose [as oncomplete] (fs.js:511:3)
Edwins-MacBook-Pro:ERC20 Edwin$