No RPM when in drive or reverse, but RPM response when in park or neutral

Thanks for the reply Joe. Before the problem started, I replaced the rear CV joint, I opened the cluster coz I checked 1 light. Now the driver power seat won't work, the mirrors are not working and no rpm or accelerator when in drive or reverse.

Thanks for the reply Ken. Sorted the power windows and seat. 1 mechanic checked by obd2 and he reset the check engine then we tried to run test, about 1km drive, the vehicle just stopped, we pull over on the side of the road and checked the issue, and found out that no more negative supply to the fuel pump and to the fuse box in the engine compartment. Engine cranks but it won't start. Tried swapping original computer box and 1 that I bought from the scrap yard but still the same. Removed battery cradle and found lose engine ground and corroded terminals so I cleaned all terminals and connections, but issue still the same, no check engine light but when the other mechanic checked with other obd, he said there's 2 ground fault or something.

Again, thanks Ken. I took the car to the garage and total of four mechanics with knowledge in electrical including my self checked the wiring's. One wire going to the fuse box got burnt and we replaced it including the fuse box that I think got burnt too (attached is the broken fuse box) after we replaced those parts and checked with obd reader again, there is a U1000 error code and one more that we cannot identify. I also bought a used computer box because I thought it was the issue.
We noticed that all ground supply is dead that is why the fuel pump not functioning, fuse box no supply of negative but has positive supply.