在composer.json中修改:

In composer.json change:

 "psr-4": {
        "App\": "myforms/app/"
    } 

到:

 "psr-4": {
        "App\": "app/"
    }

在服务器上，在您的源目录中，运行 composer update 然后 composer dump-autoload

On the server, in your source directory, run composer update then composer dump-autoload

Laravel 中的 PSR-4 查找相对于项目根目录的命名空间

PSR-4 in Laravel looks for namespaces relative to the root of the project