The application could not run because of the following error:
#0 /home/i/icetomcat4/private/System/Entity/AbstractEntity.php(266): System\Entity\AbstractEntity->__setProperty('material_id', '0')#1 /home/i/icetomcat4/private/System/Entity/AbstractEntity.php(221): System\Entity\AbstractEntity->__set('material_id', '0')#2 /home/i/icetomcat4/private/System/Entity/AbstractEntity.php(87): System\Entity\AbstractEntity->initialize(Array)#3 /home/i/icetomcat4/private/System/Entity/AbstractEntity.php(147): System\Entity\AbstractEntity->__construct(Object(Application\Core\Model\Category\Category), Array)#4 /home/i/icetomcat4/private/System/Entity/AbstractEntityPrototype.php(483): System\Entity\AbstractEntity::create(Object(Application\Core\Model\Category\Category), Array)#5 /home/i/icetomcat4/private/System/Entity/AbstractDataMapper.php(284): System\Entity\AbstractEntityPrototype->createEntity(Array)#6 /home/i/icetomcat4/private/System/Entity/AbstractDataMapper.php(186): System\Entity\AbstractDataMapper->createEntity(Array)#7 /home/i/icetomcat4/private/System/Entity/AbstractDataMapper.php(116): System\Entity\AbstractDataMapper->findFirst(Array)#8 /home/i/icetomcat4/private/System/Entity/AbstractEntityPrototype.php(625): System\Entity\AbstractDataMapper->findFirstIdentity(Array)#9 /home/i/icetomcat4/private/System/Entity/EntityPrototype.php(120): System\Entity\AbstractEntityPrototype->findFirstIdentity(Array)#10 /home/i/icetomcat4/private/Application/Core/Controller/FrontController.php(104): System\Entity\EntityPrototype::findFirstIdentity_s(Object(System\Kernel), Array)#11 [internal function]: Application\Core\Controller\FrontController->Application\Core\Controller\{closure}()#12 /home/i/icetomcat4/vendor/slim/slim/Slim/Slim.php(1208): call_user_func_array(Object(Closure), Array)#13 /home/i/icetomcat4/vendor/slim/slim/Slim/Slim.php(1349): Slim\Slim->applyHook('slim.before.rou...')#14 /home/i/icetomcat4/vendor/slim/slim/Slim/Middleware/Flash.php(85): Slim\Slim->call()#15 /home/i/icetomcat4/vendor/slim/slim/Slim/Middleware/MethodOverride.php(92): Slim\Middleware\Flash->call()#16 /home/i/icetomcat4/vendor/slim/slim/Slim/Middleware/PrettyExceptions.php(67): Slim\Middleware\MethodOverride->call()#17 /home/i/icetomcat4/vendor/slim/slim/Slim/Slim.php(1300): Slim\Middleware\PrettyExceptions->call()#18 /home/i/icetomcat4/private/System/Kernel.php(472): Slim\Slim->run()#19 /home/i/icetomcat4/public_html/index.php(7): System\Kernel->run()#20 {main}