Can't enter Basic Settings error 503

Hi my name is Alon and i’m trying to test Shopware. I think the installatie gone well. Unfortunately when i try to enter te basic settings menu in the back office. I get a 503 eror. So i was hoping some of you know what i was doing wrong. The following message was showing. Fatal error: Uncaught exception ‘Zend_Json_Exception’ with message ‘Decoding failed: Syntax error’ in /home/studiosh/domains/ Stack trace: #0 /home/studiosh/domains/ Zend_Json::decode(’[{“property”:…’) #1 [internal function]: Enlight_Controller_Plugins_JsonRequest_Bootstrap->onPreDispatch(Object(Enlight_Controller_ActionEventArgs)) #2 /home/studiosh/domains/ call_user_func(Array, Object(Enlight_Controller_ActionEventArgs)) #3 /home/studiosh/domains/ Enlight_Event_Handler_Default->execute(Object(Enlight_Controller_ActionEventArgs)) #4 /home/studiosh/domains/ Enlight_Event_EventManager->not in /home/studiosh/domains/ on line 93 503 Service Unavailable