大小写修改

app/Http/Kernel.php

@@ -19,7 +19,7 @@ class Kernel extends HttpKernel
         \App\Http\Middleware\TrimStrings::class,
         \Illuminate\Foundation\Http\Middleware\ConvertEmptyStringsToNull::class,
         \App\Http\Middleware\TrustProxies::class,
-        \App\Http\Middleware\Cors::class,
+        \App\Http\Middleware\CORS::class,
 
     ];