Run

php artisan cache:clear
php artisan route:cache

on prod server

thanks for your answer: cache:clear was ok, but route:cache gives me

Route cache cleared!

   LogicException  : Unable to prepare route [api/user] for serialization. Uses Closure.

  at /var/www/intranet/vendor/laravel/framework/src/Illuminate/Routing/Route.php:917
    913|      */
    914|     public function prepareForSerialization()
    915|     {
    916|         if ($this->action['uses'] instanceof Closure) {
  > 917|             throw new LogicException("Unable to prepare route [{$this->uri}] for serialization. Uses Closure.");
    918|         }
    919|
    920|         $this->compileRoute();
    921|

  Exception trace:

  1   Illuminate\Routing\Route::prepareForSerialization()
      /var/www/intranet/vendor/laravel/framework/src/Illuminate/Foundation/Console/RouteCacheCommand.php:62

  2   Illuminate\Foundation\Console\RouteCacheCommand::handle()
      /var/www/intranet/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:32

  Please use the argument -v to see more details.

and the problem is still there. thanks

this is a bug in Laravel from what I know. If you are not using routes in api.php... just delete all routes in api.php file

and try again