Hi @george,
I have been trying to work on the project this most affects or me and it has been INCREDIBLY painful today.
Trying to manage it by constantly adjusting the head page reference is time consuming and a massive productivity killer. When you add some components (such as modals and conditional regions) the UI looks for the head page and when not found (because you have adjusted to make the design view work) it throws an error. Even worse was trying to add a where condition in a formatter for a dynamic class. The same error happened but then gets rid of anything you already did by closing the dialog. I am now working entirely in code view which is far from ideal - if I were a beginner to Wappler it would be unworkable.
This is a long-standing project that has worked fine for a very long time and has only ‘broken’ after 5.4.0
I see you and the team are team building next week. If you could find the time to address this with an inline update in the meantime, I know I would be super appreciative!