Hello Ethan,
It seems that the error that you are getting is because the "Joystick Input" block was not able to create an S-function module properly which is crucial for Simulink Real-time applications. You can try re-building the application to check if the S-function module associated with the block is fixed or you can also try leveraging the following community file exchange that might suit your use case:
Additionally, you can also check out the documentation for "Gamepad Joystick" block for an alternative:
Hope it helps!
