Are you sure your initial configuration is somewhat reasonable to start doing some dynamics at this given temperature and timestep? Both of the errors you have could be related to particles moving too fast due to them experiencing unrealistically large forces (see for example ERROR: Out of range atoms - cannot compute PPPM for the second error you got. For the first error, the atoms could have flown outside the region during the dynamics as a consequence of the large force experienced).
Have you also confirmed if your force field is suitable for this specific system you are trying to investigate? Also, you seem to have set some pretty steep potentials at the walls of the regions you defined in the input script you posted. I wonder if this could be the cause.