fix: add cls to new function in singleton

core-model-prediction/main_model.py

@@ -37,7 +37,7 @@ class PredictMainModel:
 
     def __new__(cls):
         if cls._instance is None:
-            cls._instance = super(PredictMainModel, cls).__new__()
+            cls._instance = super(PredictMainModel, cls).__new__(cls)
             cls._instance.initialize()
         return cls._instance