Any simulink users can help me?

I created a simulink model of a mechanical system and inserted 4 fuzzy logic controllers. When running the model the message below appear. The message contents:

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Error in 'model_of_crane_of_old_thesis_samir_dr_salahlast/Fuzzy Logic Controller/FIS S-function' while executing C MEX S-function 'sffis', (mdlStart), at time 0.0.

Invalid Simulink object handle Component: Simulink | Category: Block error

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I also uploaded an image for the error