Error Packaging Function. Please try again or contact support for assistance. Cannot save any changes to simple function.

I have only just had this error happen to me when saving a simple function. Was working ok up until a few days ago. Any one have any idea how to recify? Its just a copy of the Hello world from github. Did work fine

see code below.

'use strict';
//var request = require("request");
exports.handler = (event,context,callback) => {
  console.log('Received event:', JSON.stringify(event, null, 2));
  const strJobUUID = event.eventArgs.jobUUID;
  const strJobNumber = getJobData(event);
  displayPage(event,callback,strJobNumber);
};
function getJobData(event){
  const options = {
    method: 'GET',
    headers: {
      accept: 'application/json',
      authorization: 'Basic bmljay5zdGVwaGVuc0B2bG1hdXMuY29tLmF1OjBmMTM3NWQxLTJhNzQtNDczOC1iMjUxLTIyNmZlZDU3YzgyYg=='
    }
  };
  return "Oi";
}

function displayPage(event,callback,strJobNumber){
  const strHTML = `
  <html>
    <head>
      <link rel="stylesheet" href="https://platform.servicem8.com/sdk/1.0/sdk.css">
        <script src="https://platform.servicem8.com/sdk/1.0/sdk.js"></script>
      <script>
        var client = SMClient.init();
        
        //Resize Addon Window
        client.resizeWindow(500, 200);
        
      </script>
    </head>
    <body>
		<h1>Hello World Lambda Event</h1>
		
		<p>You have opened job <b>` + event.eventArgs.jobUUID + `</b></p>
    <p>Hope this displays job number (data for the moment) <b>` + strJobNumber + `</b></p>
		
		<button onClick="client.closeWindow();">Close Window</button>
	</body>
</html>
  `;

  // callback is what data is returned from the function
  callback(null,
    {
      eventResponse: strHTML
    }
  );
}

Any ideas would be unreal.