Hello,
The Publish to Facebook functionality no longer available with 2020 Design. Effective August 1st, there has been a change in the API from Facebook. Facebook no longer allow applications to upload images without authorised partnerships.
Here is an official link if necessary:
https://developers.facebook.com/blog/post/2018/04/24/new-facebook-platform-product-changes-policy-updates/
Due to a change in Facebook policy it is no longer possible to upload 360 Panoramic Images directly from 2020 Design. The functionality “Publish 360 Panos To Facebook” is therefore no longer available. Clients trying to use the functionality with get an “undefined” message appearing in the dialog box.
2020 will continue to look into implementing similar feature for future 2020 Design updates.
Thank you
2020