Conversion problem from scalar to Vector in Simulink.

Hello, everyone,

I am working on a specific controller design by using the MATLAB Function block inside the subsytem.

But I am getting the ffollowing error:

Inferred size ('[1 9]') for data 'z_dot_1' does not match back propagated size ('scalar') from Simulink.

Component:MATLAB Function | Category:Coder error

Simulink cannot determine sizes and/or types of the outputs for block 'LBS/Subsystem/MATLAB Function' due to errors in the block body, or limitations of the underlying analysis. The errors might be inaccurate. Fix the indicated errors, or explicitly specify sizes and/or types for all block outputs.

Component:MATLAB Function | Category:Coder error

Simulink cannot determine sizes and/or types of the outputs for block 'LBS/Subsystem/MATLAB Function' due to errors in the block body, or limitations of the underlying analysis. The errors might be inaccurate. Fix the indicated errors, or explicitly specify sizes and/or types for all block outputs.

Component:Simulink | Category:Model error

An error occurred while propagating data type 'double' through 'LBS/Subsystem/MATLAB Function'.

Kindly help me to fix the following errors as soon as possible please.