Recent error when using a divider in a header or subheader

st.subheader("Contact the Developer", divider='rainbow')
this has always worked for my app deployed on Streamit cloud. but I checked my app today and discovered that im now getting the following error:

TypeError: HeadingMixin.subheader() got an unexpected keyword argument ‘divider’

tried switching from a subheader to a header but still getting the same error

Make sure you are using streamlit >= 1.26.0.

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