How can I convert a transfer function into time dependent using ilaplace

I have tried to use ilaplace

X2=(F*G3+C*G3)/(1+C*G3); % F,G3,C are transfer functions generated using tf

v=sym('X2');

x=ilaplace(v);

then i use it to plot a function using plot but when i try to run the code i get an error as shown below

??? The following error occurred converting from sym to double: Error using ==> mupadmex Error in MuPAD command: DOUBLE cannot convert the input expression into a double array.