Hello everyone,

after connecting my Odoo Instance with a public DNS, I get the following error when a Client clicks in an invoice mail on the "view invoice" and gets sent to the invoice Webform. There the following error shows up in a Pop-Up:

UncaughtPromiseError > TypeError

Uncaught Promise > undefined is not an object (evaluating '$wrapwrap[0].scrollHeight')

Details:

TypeError: undefined is not an object (evaluating '$wrapwrap[0].scrollHeight')
    _updateIframeSize@https://my.website.com/web/assets/e229f5b/web.assets_frontend_lazy.min.js:7086:133
    start@https://my.website.com/web/assets/e229f5b/web.assets_frontend_lazy.min.js:7085:952
    @https://my.website.com/web/assets/e229f5b/web.assets_frontend_lazy.min.js:3353:521

The "my.website" I replaced.

I would love to get some help or a few hints because I have no idea what might causes this. Google Chrome doesn't even properly show the site, however on mobile (iOS, Safari) it works without any problems. The "review quote" Site also works without any problems. 

Thank you already in advance.