Update api/routes.py

api/routes.py

@@ -161,7 +161,7 @@ async def import_patients(
     
     try:
         await create_indexes()
-        files = glob.glob(f"{SYNTHEA_DATA_DIR}/*.json")
+        files = glob.glob(str(SYNTHEA_DATA_DIR / "*.json"))
         operations = []
         imported = 0