Can’t add class

When I try to type in the customer class fiend, it comes up with an error in main.js

Uncaught TypeError: t.props.onChangeInput is not a function
at t.onInputChange (main.js:1)
at Object.<anonymous> (main.js:14)
at c (main.js:14)
at main.js:14
at i (main.js:14)
at a (main.js:14)
at Array.forEach (<anonymous>)
at r (main.js:14)
at p (main.js:14)
at ke (main.js:14)
t.onInputChange @ main.js:1
(anonymous) @ main.js:14
c @ main.js:14
(anonymous) @ main.js:14
i @ main.js:14
a @ main.js:14
r @ main.js:14
p @ main.js:14
ke @ main.js:14
rr @ main.js:14
q @ main.js:14
Pe @ main.js:14
ir @ main.js:14
Te @ main.js:14