Merge branch 'f-error-handling' into f-insert

src/caosdb/configuration.cpp

@@ -508,7 +508,8 @@ auto ConfigurationManager::InitializeDefaults() -> int {
     mLoadSingleJSONConfiguration(*configuration_file_path);
   }
 
-  if (this->json_configuration.as_object().contains("logging")) {
+  if (this->json_configuration.is_object() &&
+      this->json_configuration.as_object().contains("logging")) {
     LoggingConfiguration logging_configuration =
       logging_configuration_helper.CreateLoggingConfiguration(
         json_configuration.at("logging").as_object());