Update app.py

app.py

@@ -318,9 +318,9 @@ elif st.session_state.current_index == -2:
         navigate(1)
     else:
         with st.form("data_form"):
-            st.session_state.user_id = st.text_input('Please enter your user ID', value=user_id_from_url)
-            if st.form_submit_button("Submit"):
-                navigate(1)
+            st.session_state.user_id = st.text_input('User ID', value=user_id_from_url)
+            add_validated_submit([st.session_state.user_id], "Please enter a valid user ID")
+
 
 elif st.session_state.current_index == -1:
     add_annotation_guidelines()