Firmware 2.5.0 for openMV3

I cloned the latest version of openmv from GitHub - openmv/openmv: OpenMV Camera Module and compiled for openmv3 . And it can connect with IDE and showed Fireware version 2.5.0 ,but can’t run every program. And there is a file named ERROR.LOG where contained an error :
Failed to init sensor, error:-2
How can I solve this problem ?
Thanks !!!

Which firmware did you install on your board?