Manage Watchers button Not working in the New Confluence Cloud User Interface (SPA)

This is only happening with Confluence Cloud New User Interface a.k.a SPA, if you're using server or your Confluence Cloud hasn't changed yet, please disregard

Steps to reproduce:
1. Click the watch button on a page.
2. Click "manage watchers"

Expected behaviour
Dialog shows, allowing you to manage watchers

Actual behaviour
Nothing happens

Workaround:
Not yet