fixed minor issues

app.py

@@ -27,7 +27,7 @@ model_folder = 'models/'
 max_img_size = 800
 ################################
 
-@st.cache(allow_output_mutation=True)
+@st.cache(allow_output_mutation=True, show_spinner=False)
 def load_model(model_dir, option):
     if option.lower() == 'artistic':
         model_url = 'https://data.deepai.org/deoldify/ColorizeArtistic_gen.pth'
@@ -224,6 +224,7 @@ try:
 except:
     colorizer = None
     print('Error while loading the model. Please refresh the page')
+    st_title_message.markdown("**Error while loading the model. Please refresh the page**")
 
 if colorizer is not None:
     st_title_message.markdown("**To begin, please upload an image** 👇")