Sage is a potential WIP according to the developer @raisjn:
"This is on a case by case basis, I typically use NiLuJe's fbink to look up what support is necessary for a device. the advice I had previously received from NiLuJe is to get the Clara working because that is similar to the most other Kobo devices. In terms of supporting that device listed - yes, it seems possible, but we would end up doing a lot of work. My ideal is to somehow use fbink as the backend for rmkit's notion of a framebuffer. then we can say anywhere fbink works, rmkit is supported (for drawing to screen). the main issue after that is aligning the input coordinates with the display coordinates"
https://www.mobileread.com/forums/sh...0&postcount=25
If you want you can try a debug session and report back the error,e.g:
https://www.mobileread.com/forums/sh...41&postcount=7
For Clara HD users Harmony and Puzzles working great. Further projects suspended while I just relax and play with my fun new apps!
https://www.mobileread.com/forums/sh...7&postcount=10
https://www.mobileread.com/forums/sh...1&postcount=28