An internal error occurred while trying to spawn the application. Exception type: Passenger::RuntimeException Error message: Cannot determine a user to lower privilege to Backtrace: in 'void Passenger::ApplicationPool2::Spawner::prepareUserSwitching(Passenger::ApplicationPool2::Spawner::SpawnPreparationInfo&, const Passenger::ApplicationPool2::Options&) const' (Spawner.h:1001) in 'Passenger::ApplicationPool2::Spawner::SpawnPreparationInfo Passenger::ApplicationPool2::Spawner::prepareSpawn(const Passenger::ApplicationPool2::Options&)' (Spawner.h:813) in 'void Passenger::ApplicationPool2::SmartSpawner::startPreloader()' (SmartSpawner.h:205) in 'virtual Passenger::ApplicationPool2::SpawnObject Passenger::ApplicationPool2::SmartSpawner::spawn(const Passenger::ApplicationPool2::Options&)' (SmartSpawner.h:750) in 'void Passenger::ApplicationPool2::Group::spawnThreadRealMain(const Passenger::ApplicationPool2::SpawnerPtr&, const Passenger::ApplicationPool2::Options&, unsigned int)' (Implementation.cpp:1038)