TYPO3 Core

fresh installation throws exception:

Fatal error: Call to a member function getUid() on a non-object in /var/www/test/typo3/6.1.5/typo3/sysext/extensionmanager/Classes/Utility/Repository/Helper.php on line 251 Call Stack: 0.0007 336476 1. {main}() /var/www/test/typo3/6.1.5/typo3/mod.php:0 0.2352 5551740 2. TYPO3\CMS\Extbase\Core\ModuleRunner->callModule() /var/www/test/typo3/6.1.5/typo3/mod.php:47 0.2371 5564300 3. TYPO3\CMS\Extbase\Core\Bootstrap->run() /var/www/test/typo3/6.1.5/typo3/sysext/extbase/Classes/Core/ModuleRunner.php:81 0.3330 6691956 4. TYPO3\CMS\Extbase\Core\Bootstrap->handleRequest() /var/www/test/typo3/6.1.5/typo3/sysext/extbase/Classes/Core/Bootstrap.php:197 0.3488 6804104 5. TYPO3\CMS\Extbase\Mvc\Web\BackendRequestHandler->handleRequest() /var/www/test/typo3/6.1.5/typo3/sysext/extbase/Classes/Core/Bootstrap.php:208 0.3597 7019624 6. TYPO3\CMS\Extbase\Mvc\Dispatcher->dispatch() /var/www/test/typo3/6.1.5/typo3/sysext/extbase/Classes/Mvc/Web/BackendRequestHandler.php:47 0.4510 9290300 7. TYPO3\CMS\Extbase\Mvc\Controller\ActionController->processRequest() /var/www/test/typo3/6.1.5/typo3/sysext/extbase/Classes/Mvc/Dispatcher.php:100 0.5618 11061444 8. TYPO3\CMS\Extbase\Mvc\Controller\ActionController->callActionMethod() /var/www/test/typo3/6.1.5/typo3/sysext/extbase/Classes/Mvc/Controller/ActionController.php:186 0.5620 11063228 9. call_user_func_array() /var/www/test/typo3/6.1.5/typo3/sysext/extbase/Classes/Mvc/Controller/ActionController.php:285 0.5620 11063480 10. TYPO3\CMS\Extensionmanager\Controller\UpdateFromTerController->updateExtensionListFromTerAction() /var/www/test/typo3/6.1.5/typo3/sysext/extbase/Classes/Mvc/Controller/ActionController.php:0 0.5699 11120844 11. TYPO3\CMS\Extensionmanager\Utility\Repository\Helper->updateExtList() /var/www/test/typo3/6.1.5/typo3/sysext/extensionmanager/Classes/Controller/UpdateFromTerController.php:106 0.5699 11120888 12. TYPO3\CMS\Extensionmanager\Utility\Repository\Helper->isExtListUpdateNecessary() /var/www/test/typo3/6.1.5/typo3/sysext/extensionmanager/Classes/Utility/Repository/Helper.php:279

line 251:

if ($this->extensionRepository->countByRepository($this->repository->getUid()) <= 0) {

$this->repository is null