未找到laravel/lumen framework:“5.7.*”和flipbox/lumen generator:“^5.6”类

我认为这与composer autoload没有检测到laravel/lumen framework/src之外的包有关

我对下面问题的上述假设正确吗?我要把psr-4钥匙放进去吗 "autoload-dev" 嵌套对象?

我真的很感谢你的帮助。

下面是错误异常, composer.json 代码段和堆栈跟踪日志

在composer.json下面

        {
        ...
        "autoload": {
            "classmap": [
                "database/seeds",
                "database/factories"
            ],
            "psr-4": {
                "App\\": "app/"
            }
        },
        "autoload-dev": {
            "classmap": [
                "tests/"
            ]
        },
        ...
    }

storage/lumen.log

[2018-10-09 07:51:53] local.ERROR: Symfony\Component\Debug\Exception\FatalThrowableError: 
Class '\FlipBox\LumenGenerator\LumenGeneratorServiceProvider' not found in 
/var/www/vendor/laravel/lumen-framework/src/Application.php:183
Stack trace:
#0 /var/www/bootstrap/app.php(86): Laravel\Lumen\Application->register('\\FlipBox\\LumenG...')
#1 /var/www/public/index.php(14): require('/var/www/bootst...')
#2 {main} {"exception":"[object] (Symfony\\Component\\Debug\\Exception\\FatalThrowableError(code: 0): 
Class '\\FlipBox\\LumenGenerator\\LumenGeneratorServiceProvider' not 
found at /var/www/vendor/laravel/lumen-framework/src/Application.php:183)
[stacktrace]
#0 /var/www/bootstrap/app.php(86): Laravel\\Lumen\\Application->register('\\\\FlipBox\\\\LumenG...')
#1 /var/www/public/index.php(14): require('/var/www/bootst...')
#2 {main}
"}