PID tuner causing error in intergrator block

Hi,

I'm building compensated system using a PID controller, and the design requirements are:

Settling time <3s

Overshoot <5%

I have tried to meet these requirements using the PID tuner to find the best gain values, but when i run the simulation, it produces the error shown in this image: https://i.imgur.com/mY5Abhr.png . Is this a problem with the subsystem that i am using for the model or is there something wrong with how i'm using the PID tuner?

These are images of the Simulink system, and of the subsystem: https://i.imgur.com/Ue7SeFw.png , https://i.imgur.com/BTwc4gM.png

Thanks in Advance

[Birdman]

Can you attach your Simulink model?

[FInnian Monaghan]

Sure, here it is.