Plugin now working anymore!

Good day !!

I have just renewed the Licenced to get help but somehow it doesn’t update in the right plugin I need help (thank you page customizer) so I will post here

For some reason the thank you page plugin doesn’t work anymore! when proceeding to a payment the customer is not redirected to the thank you page (I have activated the cash on delivery to test).

The order has been placed but without thank you page.