MATLAB: Getting an error when using poly2sym

poly2sym

I am trying to use curve fitting on a plot to get the equation of a fifth-degree polynomial. Everything is working fine but once I try to convert a column vector to a polynomial, the program just hangs and then I have to restart MATLAB. This is the part of the code related to curve fitting:
%CurveFitting
CFSw = table2array(T(:,2));
CFFw = table2array(T(:,6));
disp (CFSw),disp (CFFw),
fitpoly5=fit(CFSw,CFFw,'poly5');
% Plot the fit with the plot method.
figure
plot(fitpoly5,CFSw,CFFw)
% Move the legend to the top left corner.
legend('Location','NorthWest' );
xlabel('Sw')
ylabel('Fw')
disp (fitpoly5),
coeffvals = coeffvalues(fitpoly5);
disp(coeffvals),
C = coeffvals.';
disp (C),
% p = poly2sym(sym(C));
p = poly2sym(C);
disp (p),
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