I have already done the wider test and worked with paycomet support to find the issue in the last 4 days. This way, I found out that Jetpack is blocking it. All the order test were done in incognito window to avoid the caching.
Right now, I have all the other plugins active and Jetpack deactivated the order can be finalized as I get the card form.
When all the plugins are active, including Jetpack, when the order is finalized, I get the message “Se ha producido un error. Por favor, verifica los datos introducidos y prueba de nuevo.”