diff --git a/app/services/sync_service_base.rb b/app/services/sync_service_base.rb
index b3cfe7c..85251b9 100644
--- a/app/services/sync_service_base.rb
+++ b/app/services/sync_service_base.rb
@@ -13,6 +13,7 @@ class SyncServiceBase
 
   # Subclasses should initialize with a QBO client instance
   def initialize(qbo:)
+    raise "No QBO configuration found" unless qbo
     @qbo = qbo
     @entity = self.class.model_class
   end