Change not applied to page

We are using the 1.0.92.1 of RankMath with a Free plan.
We use WordPress 6.0 with Elementor.

Currently we are able to access to the SEO settings of a page but when we try to edit it’s snippet or focus keyword, after we hit the update button, the change we have made are not saved since once we reload the page, nothing as being saved for the SEO section.

Using the dev tool of our web browser, we can see there is a 404 error coming when we press update that is coming from the GET: https://audirvana.com/fr/wp-json/rankmath/v1/updateMeta?_locale=user
Before this, there is a 302 POST https://audirvana.com/wp-json/rankmath/v1/updateMeta?_locale=user

Can you please help us about this?