How can I extract the actor-critic model from a saved pre-trained agent?

I have trained a PPO agent and saved the TrainStat at the end of the training (save TrainStat). I have used the following set of commands to retrieve the actor net but the result I am getting is blank.

TrainStat.agent4

ans =

rlPPOAgent with properties:

AgentOptions: [1×1 rl.option.rlPPOAgentOptions]

>> actor = getActor(TrainStat.agent4)

actor =

rlStochasticActorRepresentation with properties:

ActionInfo: [1×1 rl.util.rlFiniteSetSpec]

ObservationInfo: [1×1 rl.util.rlNumericSpec]

Options: [1×1 rl.option.rlRepresentationOptions]

>> A_net = getModel(actor)

A_net =

[]

Please suggest if I am making any mistakes while saving the TrainStat or is there any other way to proceed.