This issue is related to v1.23.0 streamlit editable dataframe
When deployed locally you can copy from Excel and paste into editable dataframe. However, when using the deployed on the network (e.g. using the network url), that feature is no longer supported.
A simple example is to head over here: https://docs.streamlit.io/library/api-reference/data/st.data_editor
Try copying a few cells from Excel into the table there. You have to click into an individual and then paste it. You can’t paste the multiple cells at once.