why is my matlab showing blank figures?

My codes give result perfectly but whenever I try to plot something, it shows a blank figure and error messege like , "too many input arguments". I even tried the code from the examples in matlab but the outcome remains same. All the codes are correct and running perfectly in others' laptop but I'm not getting the plot at all. I am facing this problem both in matlab online and offline. Here's a code and its result:

x = 0:0.05:5;
y = sin(x.^2);
figure
plot(x,y)

Error using plot

Too many input arguments.

Error in abcd (line 4)

plot(x,y)

Answer 1

[Walter Roberson]

which plot

will show you that you are using a third-party function named plot instead of the built-in MATLAB plot function.