Hello,
This is a different problem altogether I think. I have tested the UI with the new changes and it is not broken on my end.
There are a number of reasons why the UI would not show, so please first see the troubleshooting section in the manual under “I do not see the UI elements in the frontend.”:
Also, can you check your javascript console for errors and the network tab for failed XHR requests?
If so, let me know what you see.