Currently, CIQ applications that were created from a widget cannot be installed on Edge 1040. I already created a bug for it:
https://forums.garmin.com/developer/connect-iq/i/bug-reports/ciq-widgets-cannot-be-installed-on-edge-1040
As I am not sure where such issue should be reported, I posted it also here to make sure that it will be seen by the right team.