Hi - I set up a site in German (version 8.5.2) and wanted to copy the sitemap into an English branch. When trying to copy the site tree, i get this error message:

Call to a member function getLocale() on null.
/usr/www/users/campig/concrete5_20/concrete/controllers/dialog/page/drag_request.php(125): Error->null
/usr/www/users/campig/concrete5_20/concrete/controllers/dialog/page/drag_request.php(79): Concrete\Controller\Dialog\Page\DragRequest->continueCopyAll
/usr/www/users/campig/concrete5_20/concrete/src/Controller/AbstractController.php(294): Concrete\Controller\Dialog\Page\DragRequest->doCopyAll
/usr/www/users/campig/concrete5_20/concrete/src/Controller/AbstractController.php(294): null->call_user_func_array
/usr/www/users/campig/concrete5_20/concrete/src/Routing/ControllerRouteAction.php(64): Concrete\Core\Controller\AbstractController->runAction
/usr/www/users/campig/concrete5_20/concrete/src/Http/RouteDispatcher.php(37): Concrete\Core\Routing\ControllerRouteAction->execute
/usr/www/users/campig/concrete5_20/concrete/src/Http/Middleware/DispatcherDelegate.php(39): Concrete\Core\Http\RouteDispatcher->dispatch
/usr/www/users/campig/concrete5_20/concrete/src/Http/Middleware/MiddlewareStack.php(86): Concrete\Core\Http\Middleware\DispatcherDelegate->next
/usr/www/users/campig/concrete5_20/concrete/src/Http/DefaultDispatcher.php(125): Concrete\Core\Http\Middleware\MiddlewareStack->process
/usr/www/users/campig/concrete5_20/concrete/src/Http/DefaultDispatcher.php(58): Concrete\Core\Http\DefaultDispatcher->handleDispatch
/usr/www/users/campig/concrete5_20/concrete/src/Http/Middleware/DispatcherDelegate.php(39): Concrete\Core\Http\DefaultDispatcher->dispatch
/usr/www/users/campig/concrete5_20/concrete/src/Http/Middleware/ThumbnailMiddleware.php(76): Concrete\Core\Http\Middleware\DispatcherDelegate->next
/usr/www/users/campig/concrete5_20/concrete/src/Http/Middleware/MiddlewareDelegate.php(50): Concrete\Core\Http\Middleware\ThumbnailMiddleware->process
/usr/www/users/campig/concrete5_20/concrete/src/Http/Middleware/FrameOptionsMiddleware.php(39): Concrete\Core\Http\Middleware\MiddlewareDelegate->next
/usr/www/users/campig/concrete5_20/concrete/src/Http/Middleware/MiddlewareDelegate.php(50): Concrete\Core\Http\Middleware\FrameOptionsMiddleware->process
/usr/www/users/campig/concrete5_20/concrete/src/Http/Middleware/CookieMiddleware.php(35): Concrete\Core\Http\Middleware\MiddlewareDelegate->next
/usr/www/users/campig/concrete5_20/concrete/src/Http/Middleware/MiddlewareDelegate.php(50): Concrete\Core\Http\Middleware\CookieMiddleware->process
/usr/www/users/campig/concrete5_20/concrete/src/Http/Middleware/ApplicationMiddleware.php(29): Concrete\Core\Http\Middleware\MiddlewareDelegate->next
/usr/www/users/campig/concrete5_20/concrete/src/Http/Middleware/MiddlewareDelegate.php(50): Concrete\Core\Http\Middleware\ApplicationMiddleware->process
/usr/www/users/campig/concrete5_20/concrete/src/Http/Middleware/MiddlewareStack.php(86): Concrete\Core\Http\Middleware\MiddlewareDelegate->next
/usr/www/users/campig/concrete5_20/concrete/src/Http/DefaultServer.php(85): Concrete\Core\Http\Middleware\MiddlewareStack->process
/usr/www/users/campig/concrete5_20/concrete/src/Foundation/Runtime/Run/DefaultRunner.php(128): Concrete\Core\Http\DefaultServer->handleRequest
/usr/www/users/campig/concrete5_20/concrete/src/Foundation/Runtime/DefaultRuntime.php(102): Concrete\Core\Foundation\Runtime\Run\DefaultRunner->run
/usr/www/users/campig/concrete5_20/concrete/dispatcher.php(45): Concrete\Core\Foundation\Runtime\DefaultRuntime->run
/usr/www/users/campig/concrete5_20/index.php(3): null->require

Does anybody have a clue?
Tx