RL AGENT toolbox. [do i have to set initial action?]

When I use RL AGENT toolbox,

I made some enviorment.

I've got some message,

'The algebraic state of an algebraic loop containing 'sphysicalMotorRL/sphysicalMotor/angel conventional' calculated at time 0.0 is Inf or NaN. There may be a singularity in the solution. If the model is correct, try reducing the fixed step size or narrowing the error tolerance to reduce the step size. Alternatively, modify the initial estimate of the algebraic loop variable value a little.'

It states that error occurs at time 0.0.

Question.1 Do I have to set some initalcondition? how? why is this error occurs?

This is my environment.