2018 MG ZS auto gear box is locked not allowing me change into drive.

Could be a faulty brake switch or possibly a fuse .


MG ZS – fuse box diagram
Year of production:

Location
MG ZS - fuse box diagram - location
MG ZS – fuse box diagram – location
Passenger Compartment Fuse Box（below the glove box at the front passenger side
Engine Compartment Fuse Box（at the left side of the Engine Compartment
Passenger Compartment Fuse Box
MG ZS - fuse box diagram - passenger compartment
MG ZS – fuse box diagram – passenger compartment
No.
А
Function
F1 15 Rear wash realy
F2 10 Rearview mirror switch, Diagnostic Socket
F3 5 Gear shift display
F4 15 Front wash relay
F5 10 Airbag ECU
F6 10 Brake pedal switch
F7 15 Super lock relay
F8 — —
F9 — —
F10 — —
F11 — —
FI2 — —
F13 — —
F14 — —
FI5 15 Front power socket
FI6 5 Radio
F17 5 Front interior lamp, Blower relay
FI8 30 Rear left window lift switch
FI9 30 Passenger window lift switch
F20 30 Rear right window lift switch
F2I 30 Driver door switch pack
F22 10 Door mirror heater
F23 25 Rear window heating element
F24 15 Radio/FICM, DAB, ICE panel switch
F25 10 MTC, ETC, ETC pane
F26 5 Instrument pack
F27 10 Automatic transmission (4AT & 6AT)
F28 — —
F29 — —
F30 5 Ignition switch
F3I 10 TPMS
F32 5 IMMO Antenna
F33 — —
F34 — —
F35 — —
F36 — —
F37 — —
F38 — —
F39 — —
F40 — —
F41 — —
F42 — —
F43 — —
F44 — —
Engine Compartment Fuse Box
MG ZS - fuse box diagram - engine compartment
MG ZS – fuse box diagram – engine compartment
No.
А
Function
FL1 200 Alternator
FL2 80 EPS
FL3 40 Cooling fan relay pack
FL4 60 Passenger compartment fuse box fuse F18, F19, F20, F21
FL5 80 Passenger compartment fuse box fuse F1, F2, F3, F4, F5, F6, F7, F24, F25, F26, F27, F28, F29, F30, F31, Rear windscreen heater relay
FL6 25 SCS（Valve）
FL7 — —
FL8 20 BCM
FL9 40 SCS（Pump
FL10 25 BCM
FL11 30 Blower relay
FL12 — —
FL13 30 Starter relay
FL14 25 —
FL15 30 KLR relay
FL16 30 DC/DC
FL17 30 —
F1 10 Right dipped beam, Headlamp leveling switch, Right headlamp leveling motor
F2 15 Alternator, Pre oxygen sensor, Post oxygen sensor, Variable
valve timing valve (Intake, 1.0T), VVT valve (Exhaust, 1.0T), Canister control valve (1.0T), Oil control valve (1.0T)
F3 10 Left dipped beam, Left headlamp leveling motor
F4 10 A/C Compressor Clutch Relay
F5 5 Engine ECU
F6 10 Fuel injector（1.5L
F7 30 Front wiper enable relay, Front wiper speed relay
F8 5 Cooling fan relay pack, AC pressure switch, NTS
F9 15 Fuel pump relay
F10 10 Right main beam
F11 10 Left main beam
F12 30 Ignition coil, Engine ECU
F13 10 Horn relay
F14 30 —
F15 10 Intake camshaft solenoid (1.5L), Exhaust camshaft solenoid (1.5L), Canister control valve (1.5L), Clutch position sensor (1.5L), Waste gate control valve (1.0T), Electronic thermostat (1.0T), Water pump (1.0T), Variable dump valve (1.0T)
F16 15 Rear wiper relay
F17 15 Front fog relay
F18 5 Airbag ECU
F19 5 Engine ECU
F20 5 Engine ECU
F21 5 BCM
F22 10 —
F23 10 —
F24 5 —
F25 10 BCM
F26 15 —
F27 15 BCM
F28 15 —
F29 10 —
F30 10 DC/DC, Instrument pack, ETC, Reverse lamp switch, 6AT gear shift, PAB display

Only video and best I can find at the moment that might help you

https://www.youtube.com/watch?v=i14ZAVXU0FM