Have I missed an announcement about applications stored in GIT and publishing to Sandbox? It looks like it’s still not possible but Mendix is transitioning to using GIT as standard. I’ve just had to duplicate a project into SVN so some colleagues could use it in the Sandbox. Am I missing something?
Do you mean the Publish button is disabled for newly created apps using Git?
That is something we are aware of and looking into. It seems to happen only after the creation of a new app.
A workaround for now is to close and re-open the app in Studio Pro.