Add debug statement

app.py

@@ -36,6 +36,8 @@ def predict(input):
 def main():
     global interpreter
     print("Loading model...")
+    import os
+    print(os.listdir("woz_nlu_agent/models/nlu"))
     interpreter = Interpreter.load(MODEL_PATH)
     print("Model loaded.")
     iface = gr.Interface(fn=predict, inputs="text", outputs="text")