Mudita Dixit

I using the instances.create action, something like this:

client.invoke('instances.create', {  location: 'modal',

url: 'https://en.m.wikipedia.org/wiki/Main_Page',

  size: { // optional

    width: '450px',

    height: '300px'

  }

However rather than passing in a url, I would like to pass html, coz I generate a template using a schema that comes to me via an api call. 
I tried converting my html to a blob and then generate a url using URL.createObjectURL() method on that blob, however when my modal opens, I am hit by an error 'tried to show an iframe with a location that is neither absolute nor asset'
Is there a way I can get around this ?