After updating from 2.8 to 2.9 in my sandbox (and updating all URLs in Mosaico tables as a result of site URL change), I notice that the interface to edit existing templates isn't really usable.
Here's what it looked like in 2.8
And here's what it looks like after update to 2.9:
So with 2.9, this new interface doesn't allow me to edit the templates -- nor can I change the template settings....
Any suggestions on how to resolve?