PnP Site Script (JSON) - createSPList subaction for addFile - I can't get this to work...Please Help

[wniemiGHUb]

I am hoping someone can help resolve this Site Script issue:

I am creating SharePoint Online Site Scripts to add to Site Designs. I am able to create a document library with folders and provision a new site with the Site Design which provisions a new document library. When I attempt to use the addFile subaction, so that I can include a file within my provisioned document library, no file is ever created within the new Document Library instance. I have tried both a simple Excel File and a Word Document to no prevail. Anyone have experience with the addFile subaction?

Here is an example of my Site Script (JSON) - which everything works except for the addFile entry (tenant URL in sourceUrl masked out by 'x'):

{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/site-script-action.schema.json",
  "actions": [
    {
      "verb": "createSPList",
      "listName": "Project Documents",
      "templateType": 101,
      "subactions": [
        {
          "verb": "addFolder",
          "path": "Accounting"
        },
        {
          "verb": "addFolder",
          "path": "Accounting/Burn Rate"
        },
        {
          "verb": "addFile",
          "destination": "Accounting/Burn Rate/Burn Rate Template.xlsx",
          "sourceUrl": "https://xxxxxxxxx.sharepoint.com/sites/MPProjectsSiteTemplate/Project%20Documents/Accounting/Burn%20Rate/Burn%20Rate%20Template.xlsx"
        }
      ]
    },
    {
      "verb": "addNavLink",
      "url": "/Project%20Documents/Forms/AllItems.aspx",
      "displayName": "Project Documents",
      "isWebRelative": true
    }
  ],
  "bindata": {},
  "version": 1
}