Uncaught ReferenceError: ClipboardItem is not defined

It's a bug in the powerbi script. It should check if ClipboardItem is available because it isn't always there. Microsoft forgot to put it inside a try/catch clause. ClipboardItem is not defined when:
- http:// is used in chromium without localhost
- cross-origin iframes (when you load powerbi using the javascript client api)

Another solution for MS is to put this code at the start of the injected iframe to mock the clipboard:

if (typeof ClipboardItem == 'undefined') {
    ClipboardItem = window.ClipboardItem = function (items) {
        return items;
    };
}

This is not possible to do yourself when you are embedding Powerbi inside your own website. That is because the cross-origin settings do not allow injecting javascript in the iframe. So I'm not able to produce a workaround for that situation.

It's only possible when using playwright:

await context.addInitScript(`
    if (typeof ClipboardItem == 'undefined') {
        ClipboardItem = window.ClipboardItem = function (items) {
            return items;
        };
    }
`);