mustang base model

Hello I’m completely new to the ford / mustang world. I recently bought a 2020 Mustang GT base model with preformance upgrades done to it including non active exhaust flow master, sync 3 system installed. I’m experiencing an error when selecting drive modes the only two i have available are...

I recently upgraded my '17 base Mustang from a 4" screen to an 8" screen by following 4Dtech youtube video, everything work but.. However, the start button does not respond at all. Pressing the button does not activate any accessory power, nor does it initiate the engine start-up...