MPC touch not supported on High Sierra and Lion.
Mojave needs the latest drivers from the MPC 2.3 installer. Run it again, select MPC Touch and install all the drivers. reboot, run installer again, select config screen.
\You can also use Sierra with no problems, just not high sierra. El Capitan is also fine.
Bug reports & end-user tech support for Akai's generation of MPC Software 'controllers' - MPC Touch, MPC Renaissance & MPC Studio.