Update app.py

app.py

@@ -104,11 +104,16 @@ if option == "Ask a Question":
 # View previous conversations
 elif option == "View Previous Conversations":
     if os.path.exists(conversation_file):
-        with open(conversation_file, "r") as file:
-            st.text_area("Previous Conversations", file.read(), height=300)
+        try:
+            with open(conversation_file, "r", encoding="utf-8", errors="replace") as file:
+                content = file.read()
+            st.text_area("Previous Conversations", content, height=300)
+        except Exception as e:
+            st.error(f"An error occurred while reading the file: {e}")
     else:
         st.warning("No previous conversations found.")
 
+
 # View data summary
 elif option == "View Data Summary":
     if os.path.exists(summary_file):