Try flashable elsewhereI tried to use the HTC Camera.
Versions 8.25.xxx and higher were slow, created blank pics
Versions 8.10.xxx were quick, created blank pics
Versions 7.60.xxx were quick, created pics, but no picture review from app itself, kept asking for a permission I couldn't grant. (modify system settings)
Honestly, Version 6.0.xxx on my M8 had many more features to play with, but wouldn't work (I'm assuming it needs HTC framework)