No, you did nothing wrong from the looks of it.
You didn't specify your variant, by the way.
Anyway, problem sounds like TWRP. In general, on the G3, TWRP 3.1.1 and AROMA (interface used by the Fulmics installer) don't play well together.
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer? | Terms of Service