Please ignore any warning regarding version 2.0.11--that is a beta version and should not be used.
Install EasyOpenCV Dependency
Since FTCLib depends on EasyOpenCV for vision, and because EasyOpenCV depends on OpenCV-Repackaged, you will need to copy libOpenCvNative.so from the /doc folder of that repo into the FIRST folder on the USB storage of the Robot Controller (i.e. connect the Robot Controller to your computer with a USB cable, put it into MTP mode, and drag 'n drop the file). For Control Hub, you simply have to put the file in the FIRST folder. No settings need to be checked.
Sync Gradle and Finished!
Click that button and if successful, you can now use FTCLib