WebObject and Storyline Variable

If you delete and add a new webobject with the same address it will work again. The new storyline webobject needs to be replaced. But, Chrome security updates have gimped much of the communication. I have switched to postMessage for SL to WebObject and vice versa communication.

The iframe is still being assigned to the iFrameId, but the variable delivery will no longer work. 
I switched to postMessage last year to deliver variables between webobject and storyline.

You can add a javascript trigger to send a post message with the variables. Pretty sure this needs to be added on the same layer as the webObject.

/////////////////////// In SL ///////////////////////////////

var player = GetPlayer();

const iframe = document.querySelector('iframe[data-dv_ref="iframe"]');

const var1  = player.GetVar("var1");

// Function to send message to the iframe
function sendVar(data) {
 iframe.contentWindow.postMessage(data, '*'); // '*' for all origins (adjust if needed)
console.log("Message sent To Iframe");
}

const eventData = { dataName: var1};//dataName can be anything, just make sure it matches the listener you have in the webobject.
console.log("sending custom event to iframe");
sendVar(eventData);
/////////////////// In SL end ///////////////////////////////////
/////////////////// In web object ///////////////////////////////
// add this to your webobject in a script
window.addEventListener('message', function(event) {
   if (event.data.dataName) {
  const var1 = event.data.dataName; //this is the variable to that was sent.
  console.log("Received Var from parent:", var1 );
   }
 });
/////////////////// In web object end ////////////////////////

I hope this helps/works for you.