Laravel Cors (Middleware NOT working)

Question

I recently tries enabling CORS in Laravel 5.4 but unfortunately it doesn\'t want to work. I have included the code and the error that it\'s giving me below. Can anyone help

Answer 1

I ran into a sudden CORS issue recently that was not caused by CORS header configuration, I discovered the following:

There are Red Herring scenarios that can also cause a CORS Cross Origin error to display and yet not have anything to do with CORS configuration, It is a result of when CORS is handled by middleware and something else prevents it from being triggered.

The following can indirectly cause the error to display in a browser response:

• A PHP error in a Middleware class.
• return $next($request); not being fired in middleware class method handle.
• Route::middleware in web or api router configs reference a middleware that no longer exists or is miss spelt.
• Same as above point but middleware specified in a Controller with $this->middleware();

Any of these can prevent a Cors middleware from ever being fired because the app exits too early and never sets the headers and thus results in a CORS error instead of a 500 Server Header error as a result of bad middleware files or bad references to middleware.

If you are certain you have configured CORS correctly then you should check your PHP error logs for Middleware errors.