我无法安装
Error: Class "MJCore\AbstractSetup" not found in src/addons/BR/ModernStatistic/Setup.php at line 9
include() in src/vendor/composer/ClassLoader.php at line 571
Composer\Autoload\includeFile() in src/vendor/composer/ClassLoader.php at line 428
Composer\Autoload\ClassLoader->loadClass() in src/XF/AddOn/AddOn.php at line 455
XF\AddOn\AddOn->checkRequirements() in src/XF/Admin/Controller/AddOn.php at line 841
XF\Admin\Controller\AddOn->getAddOnWarningsAndErrors() in src/XF/Admin/Controller/AddOn.php at line 387
XF\Admin\Controller\AddOn->actionInstall() in src/XF/Mvc/Dispatcher.php at line 352
XF\Mvc\Dispatcher->dispatchClass() in src/XF/Mvc/Dispatcher.php at line 259
XF\Mvc\Dispatcher->dispatchFromMatch() in src/XF/Mvc/Dispatcher.php at line 115
XF\Mvc\Dispatcher->dispatchLoop() in src/XF/Mvc/Dispatcher.php at line 57
XF\Mvc\Dispatcher->run() in src/XF/App.php at line 2487
XF\App->run() in src/XF.php at line 524
XF::runApp() in admin.php at line 13
