KeyError: 'st.session_state has no key "$$GENERATED_WIDGET_ID--None". Did you forget to initialize it? More info:

[blackary]

Hi @Eva_S, I have the same request for you as for the original poster – it’s very difficult to debug an issues like this without a reproducible code snippet. Take a look at this post Using Streamlit: how to post a question in the Streamlit forum and then please share more details so that people on the forum know how to help answer your question.