L153 updated

app.py

@@ -138,7 +138,7 @@ if prompt := st.chat_input(initial_input):
                 llm_response = "NA."
         else:
             st.warning(
-                "Sorry for the delay. We are in the progress of fine-tune the model. ⚙️"
+                "Apologies! We are in the progress of fine-tune the model, so it's currently unavailable. ⚙️"
             )
             llm_response = "NA"
 
@@ -150,7 +150,10 @@ if prompt := st.chat_input(initial_input):
         independent_ai_judge_score = []
         for i in range(final_ref.shape[0]):
             this_content = final_ref["answers"][i]
-            this_score = calculate_sts_openai_score(question, this_content)
+            if this_content != "NA":
+                this_score = calculate_sts_openai_score(question, this_content)
+            else:
+                this_score = 0
             independent_ai_judge_score.append(this_score)
 
         final_ref["ai_judge"] = independent_ai_judge_score