Hi Sergio,
Thanks for your reply! I have seen a closed thread in this support forum from 2 years ago where people had a similar issue (search get started intext:"Plugin: Creative Mail – Easier WordPress & WooCommerce Email Marketing"
).
It seems like WordPress 6.1 released 11/1/22 and the Creative Mail 1.6.2 released last week may have a conflict with eachother or some other plugins.
Hope to find a resolution soon!
-Brian