Busy with you YouTube movies trying to understand your tool. I build the Hello World demo as explained here:

. When I run it into the Sandbox, the text entry fields are not showing in the backend. What's wrong?

You should have forgotten to build your BackEnd Layouts:

Cook works with 3 step.

1. Save Projet name, infos, etc...
2. Build Tables and their Fields
3. Build Layouts (BE / FE) for each Tables (when you enter/save a Layout Name, the Builder auto create all the Table Objets ...)

enjoy

Done all 3 steps. Quit the browser. Opened it again. Opened my project. All data is there, component is visible in the backend, but no fields are visible.

Hi pvh.

You need to set field names in the "Cities" table (builder), otherwise the fields are ignored.
Simply focus on the text input box and press enter.

If you want an exemple, just create the sample project "Hello My World"
Projects > [+] > Samples > Hello My World