安装 Laravel Administrator 一直不成功, 也不知道哪里出问题了。
Illuminate\Support\ServiceProvider::mergeConfigFrom(): Failed opening requi red '/home/vagrant/Code/larabbs3/config/administrator.php' (include_path='. /usr/share/php')
Script [@php](https://learnku.com/users/10050) artisan package:discover --ansi handling the post-autoload-dump event returned with error code 255
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