diff --git a/user.py b/user.py
index 6406be4..3a78cdf 100644
--- a/user.py
+++ b/user.py
@@ -196,10 +196,14 @@ def drawFP(self):
 
         if main.fate_region == "NA":
             gachaSubId = GetGachaSubIdFP("NA")
+            if gachaSubId is None:
+                gachaSubId = "0"  # or any other default value as a string
             self.builder_.AddParameter('gachaSubId', gachaSubId)
             main.logger.info(f"Friend Point Gacha Sub Id " + gachaSubId)
         else:
             gachaSubId = GetGachaSubIdFP("JP")
+            if gachaSubId is None:
+                gachaSubId = "0"  # or any other default value as a string
             self.builder_.AddParameter('gachaSubId', gachaSubId)
             main.logger.info(f"Friend Point Gacha Sub Id " + gachaSubId)