Delete a block in Simulink changes the mux inputs and raises an error

When I comment out some blocks from the Simulink file, it raised the following error,

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Error in port widths or dimensions. 'Output Port 1' of 'closeloop_thetaPhi_both_2021_12_03/Saturation' is a one dimensional vector with 1 elements.

Component: Simulink | Category: Model error

Error in port widths or dimensions. 'Input Port 2' of 'closeloop_thetaPhi_both_2021_12_03/Mux' is a one dimensional vector with 2 elements.

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What I did was remove the fcn blocks and connect the lines.

This is the rearranged version (the one creates errors). As in the diagram, saturation block outputs the 1 dimention values but Mux sees it as a 2 dimension vector

can anyone help me to solve this issue.