The Grase Hotspot project is currently in Hiatus. Due to lack of available time, development has ceased for now. See https://gitlab.com/grase/grase-www-portal or https://github.com/GraseHotspot/grase-www-portal if you are interested in forking the project.
There are currently 2 versions, V4 is the latest but is missing some features that V3 has. Start here to install V3 and here to install V4