Added note for gpt3 error

app.py

@@ -197,6 +197,10 @@ def interface():
 
                         ### ⏳ After you click 'Submit', the models will take a couple seconds to process your inputs. 
                         ### 🤖 Then, the models will output the POS Tagging or Chunking in your prompt with three different strategies based on your selections!
+
+                        Note: If you get an 'Error' in the gpt-3.5 model, check the following:
+                              - Check that you entered your key correctly without any extra characters.
+                              - If you used a free key, it means you exceeded your quota from the free API Key.
                         """)
 
             # Inputs