插件 当前统计 - modern statistic 3.2.0

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

@死了算了
core-compiled.js?_v=e7c4eb27:57 PHP: <br />
<b>Fatal error</b>: Class 'MJCore\AbstractSetup' not found in <b>/www/wwwroot/xtchub.xmsmi.cn/src/addons/BR/ModernStatistic/Setup.php</b> on line <b>9</b><br />
一安装就报错
根本无法安装
给我一个解释
上面是报错的地方。