PHP artisan package:discover --ansi 报错不知道怎么回事。。。

使用 php artisan package:discover --ansi 突然报错了，不知道什么情况。
然后把 vendor 文件删除之后重新
composer update
还是出错
请问怎么解决？

G:\WWW\renwubao>php artisan package:discover --ansi
PHP Fatal error:  Uncaught Error: Call to a member function connection() on null in G:\WWW\renwubao\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php:1249
Stack trace:
#0 G:\WWW\renwubao\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php(1215): Illuminate\Database\Eloquent\Model::resolveConnection('mysql')
#1 G:\WWW\renwubao\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php(1047): Illuminate\Database\Eloquent\Model->getConnection()
#2 G:\WWW\renwubao\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php(964): Illuminate\Database\Eloquent\Model->newBaseQueryBuilder()
#3 G:\WWW\renwubao\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php(642): Illuminate\Database\Eloquent\Model->newModelQuery()
#4 G:\WWW\renwubao\vendor\laravel-admin-ext\reporter\src\Reporter.php(117): Illuminate\Database\Eloquent\Model->save()
#5 G:\WWW\renwubao\vendor\laravel-admin-ext\reporter\src\Reporter.php(69): Encore\Admin\Reporter\Reporter->store(Array)
#6 G:\WWW\renwubao in G:\WWW\renwubao\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php on line 1249
PHP Fatal error:  Uncaught Error: Call to a member function connection() on null in G:\WWW\renwubao\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php:1249
Stack trace:
#0 G:\WWW\renwubao\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php(1215): Illuminate\Database\Eloquent\Model::resolveConnection('mysql')
#1 G:\WWW\renwubao\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php(1047): Illuminate\Database\Eloquent\Model->getConnection()
#2 G:\WWW\renwubao\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php(964): Illuminate\Database\Eloquent\Model->newBaseQueryBuilder()
#3 G:\WWW\renwubao\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php(642): Illuminate\Database\Eloquent\Model->newModelQuery()
#4 G:\WWW\renwubao\vendor\laravel-admin-ext\reporter\src\Reporter.php(117): Illuminate\Database\Eloquent\Model->save()
#5 G:\WWW\renwubao\vendor\laravel-admin-ext\reporter\src\Reporter.php(69): Encore\Admin\Reporter\Reporter->store(Array)
#6 G:\WWW\renwubao in G:\WWW\renwubao\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php on line 1249