Error in Low Pass filter of STATCOM for regulating Voltage for OLTC

Hi,

Error in dimension of LPF of STATCOM. What can be root for this error? look at the model that i have attached.

Error in port widths or dimensions. Output port 1 of 'oltc_parallel_ok_102/Static Synchronous Compensator (Phasor Type)/statcom_control/AC Voltage Regulator/1st-Order Filter/In' has 2 elements. This port does not accept the dimensions (or orientation) specified by the output signal.

 Error in port widths or dimensions. Invalid dimension has been specified for input port 1 of 'oltc_parallel_ok_102/Static Synchronous Compensator (Phasor Type)/statcom_control/AC Voltage  Regulator/1st-Order  Filter/State-Space'.