diff --git a/index.php b/index.php
index 8afd779..4626b77 100644
--- a/index.php
+++ b/index.php
@@ -127,6 +127,8 @@ $config_data = json_decode($raw_json_config, false);
 				return response.text().then((text) => {
 					config_data = JSON.parse(text);
 				});
+			}).catch(() => {
+				config_data = Object(); // leave empty
 			});
 		}
 		
@@ -142,7 +144,7 @@ $config_data = json_decode($raw_json_config, false);
 		  if (Notification.permission == 'granted') {
 			navigator.serviceWorker.getRegistration().then(function(reg) {
 			  reg.showNotification("Neues Wort auf " + (config_data.title ? config_data.title : "OWE"), 
-				{ body: word, icon: config_data.logo.image_path ? config_data.logo.image_path : "OWE_Logo.png", requireInteraction: true });
+				{ body: word, icon: (config_data.logo? config_data.logo.image_path : "OWE_Logo.png"), requireInteraction: true });
 			});
 		  }
 		}