getting warning “Header may not contain more than a single header, new line detected”

Question

I am doing coding in oops for uploading image in PHP. But After submit image, it\'s giving warning

\"Header may not contain more than a single header, new line detec

Answer 1

in "Illuminate\Auth\Middleware\Authenticate" The method "redirectTo" should return an url path, not the Redirect response.

...
protected function redirectTo()
{
    if(\Auth::user()->hasRole('copy')){
        return '/copy/dashboardCopy';
    }       
}
...