diff --git a/octoprint_prusaslicerthumbnails/static/js/prusaslicerthumbnails.js b/octoprint_prusaslicerthumbnails/static/js/prusaslicerthumbnails.js
index 5b0bfff..80940ed 100644
--- a/octoprint_prusaslicerthumbnails/static/js/prusaslicerthumbnails.js
+++ b/octoprint_prusaslicerthumbnails/static/js/prusaslicerthumbnails.js
@@ -149,7 +149,7 @@ $(function() {
 			});
 
 			self.printerStateViewModel.dateString.subscribe(function(data){
-				if(data){
+				if(data && data != "unknown"){
 					OctoPrint.files.get('local',self.printerStateViewModel.filepath())
 						.done(function(file_data){
 							if(file_data){
diff --git a/setup.py b/setup.py
index 22f8abd..96bbcff 100644
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,7 @@
 plugin_name = "Slicer Thumbnails"
 
 # The plugin's version. Can be overwritten within OctoPrint's internal data via __plugin_version__ in the plugin module
-plugin_version = "1.0.4"
+plugin_version = "1.0.5"
 
 # The plugin's description. Can be overwritten within OctoPrint's internal data via __plugin_description__ in the plugin
 # module