Update app.py

add exception for gated models

app.py

@@ -249,7 +249,8 @@ with tab1:
                 else:
                     st.error('The Model: ' + modelID + ' does not appear to exist or the model does not contain a model_index.json file.'
                                                        ' Please check that that HuggingFace repo ID is valid.'
-                                                       ' For more help, please see the "How to Use" Tab above.', icon="🚨")
+                                                       'This error will also occur when trying to access Gated models.'
+                                                       ' For more help/info, please see "How to Use" Tab above.', icon="🚨")
     if modelID:
         with st.form("example_image_gen_form", clear_on_submit=True):
             testPrompt = st.text_input('Input a random test prompt to test out your '