We are trying to build the .apk and keep getting this error.
Seems like it might be a simple fix, but I can't track down the problem.
This issue is because the Minimum API level is set too low.
Please check the picture below to find the option and set it to level 23~27.
Please see the development environment requirements at: 2 Instructions for SDK configuration — PicoVR Unity SDK 0.1 documentation