Hi,
I've just tried installing "BasicTheme" and seems to works ok. So I think your theme's "composer.json" may be incorrectly formatted.
Remeber:
- Themes are just CakePHP plugins
- If want to create a theme named "Green" then you must create a plugin named "GreenTheme" ("Theme" word is the suffix used to indicate it should be treated as a theme instead of a plugin)
- So, if your package is named "MyTheme", you are telling to QACMS that you have a theme named "My". And in your theme's "composer.json" file you must use this as package "name": "VENDOR-NAME/my-theme"
Look the zip attached to this message, I've downloaded the original "BasicTheme" and changed its name to "MyTheme".
PS: I think we could bring back the "Theme Builder" shell from v1.x to to v2.x in order to make this process more simple.
Regards!