I replicated your schematic and ran it without any problems using .option maxstep=10u.
QSpice, by default, normally assigns the timestep target as simulation time / 1000. Sometimes, this timestep is too large, and the circuit may not converge easily. Therefore, we have to fight fire with fire and reassign a smaller timestep.
Parent.B40K420 (.tran).qsch (3.5 KB)