"Error: Failed to check for transaction receipt:" Web3.js[1.0.0] with Node , getting this error with sendSignedTransaction

Question

Here's the code I'm trying to run:

w3.eth.sendSignedTransaction( data ).once( 'transactionHash', (hash) => {
    console.log('hash')
  }).once('receipt', (receipt) => {
    console.log('receipt');
  }).on('confirmation', (confirmationNumber, receipt) => {
    console.log('confirmation');
  }).on('error', (err) => {
    console.log(err);
  }).then( (receipt) => {
    console.log('finally got the receipt!');
  })

The error which I'm getting on execution is as given below:

Error: Failed to check for transaction receipt:
{}
    at Object._fireError (/..../node_modules/web3-utils/src/index.js:56:17)
    at /..../node_modules/web3-core-method/src/index.js:260:23
    at <anonymous>

Any help resolving this'll be much appreciated.