Sorry, I missed it, the full path is:
wp-content/plugins/woo-products-widgets-for-elementor/freemius/includes/class-freemius.php
I have the same issue
Workaround is to disable the message from plugin.
In file wp-content/plugins/woo-products-widgets-for-elementor/freemius/includes
you can put lines 6981 to 7014 into comment, and this will remove the activation tag which I consider to be a bug.
Hopefully this will be solved in the next update of the plugin
