When displaying a content with an empty Url field, a JavaScript error is thrown preventing the content to be displayed. The console displays:

Uncaught TypeError: Cannot read property 'link' of null ez-url-view.js:35

Steps to reproduce:
In the legacy admin: create a content type with a non required Url field
In PlatformUI: create a content of that type and do not fill the Url field

the content is correctly created but PlatformUI fails to display it because of the JavaScript error.