PHPVersion: 7.0.22-0ubuntu0.16.04.1

If i install Magento 2.2.0(composer), upload theme Files(app and patches) i get Errors. For example if i want to install in "MGS -> [MGS Theme] Theme Settings" the unero theme:

Got error 'PHP message: PHP Fatal error:  Uncaught Error: Call to undefined method MGS\\Mpanel\\Helper\\Data::getUrl() in /var/www/vhosts/xxx/httpdocs/vendor/magento/module-backend/App/AbstractAction.php

Same here...

Fatal error: Uncaught Error: Call to undefined method MGS\Mpanel\Helper\Data::getUrl() in D:\xampp\htdocs\xxx\vendor\magento\module-backend\App\AbstractAction.php:343
Stack trace:
#0 D:\xampp\htdocs\xxx\generated\code\MGS\Mpanel\Controller\Adminhtml\Mpanel\Install\Interceptor.php(115): Magento\Backend\App\AbstractAction->getUrl('http://192.168....', Array)
#1 D:\xampp\htdocs\xxx\vendor\magento\module-backend\App\AbstractAction.php(314): MGS\Mpanel\Controller\Adminhtml\Mpanel\Install\Interceptor->getUrl('http://192.168....', Array)
#2 D:\xampp\htdocs\xxx\app\code\MGS\Mpanel\Controller\Adminhtml\Mpanel\Install.php(176): Magento\Backend\App\AbstractAction->_redirect('http://192.168....')
#3 D:\xampp\htdocs\xxx\generated\code\MGS\Mpanel\Controller\Adminhtml\Mpanel\Install\Interceptor.php(24): MGS\Mpanel\Controller\Adminhtml\Mpanel\Install->execute()
#4 D:\xampp\htdocs\xxx\vendor\magento\framework\App\Action\Action.php(107): MGS\Mpanel\Controller\Adminhtml\Mpanel\Install\Intercep in D:\xampp\htdocs\xxx\vendor\magento\module-backend\App\AbstractAction.php on line 343