Invalid indexing or function definition of curl function

The code used to work before but now is showing invalid indexing or function difinition

%<curl> <divergence> <gradient>

syms q w e r t y u i o p l k j h g f d s a z x c v b n m

fprintf('\n <curl> <divergence> <gradient>')

fprintf('\n *********************************')

fprintf('\n vector field -> 1 Scalor-> 0')

V=[x y z];

Q0= input("\n do you want to operate on a vector field or a Scalor : ");

if Q0==1

Vector1x = input ('\n input the X component of your vector : ');

Vector1y = input ('\n input the y component of your vector : ');

Vector1z = input ('\n input the z component of your vector : ');

v1=[Vector1x,Vector1y,Vector1z];

fprintf('Divergence -> 1 curl-> 0')

Q1=input("\n do you want to compute curl or divergence : ");

if Q1==1

V=[x y z];

Vd=[Vector1x,Vector1y,Vector1z];

div=divergence(Vd,V)

else

V=[x y z];

Vc=[Vector1x,Vector1y,Vector1z];

Curl=curl(Vc,V)

end

else

scaler = input( "\n write your scalor function\ : " );

fun=scaler

grad=gradient(fun,V)

end

Erorrs

Error using sym/subsindex

Invalid indexing or function definition. Indexing must follow

MATLAB indexing. Function arguments must be symbolic variables,

and function body must be sym expression.

Error in indexing (line 1079)

R_tilde = builtin('subsref',L_tilde,Idx);

Error in CDG (line 24)

Curl=curl(Vc,V)

[Rik]

Please format your code as code. That will allow you to run it within this forum. When you attempt to run it, you will notice that you have several manual inputs, which you did not describe. Please supply example inputs that you expect to work.