Hello @sarapalomares,
Sorry for the inconvenience.
It seems your WordPress admin options are not saved properly. We recommend you to reset your server file permissions and update your Database privileges.
Also, it might be possible some of your installed plugin’s or theme’s script conflicting with the SEP. We recommend you to deactivate all the plugins one by one except SEP and activate any WP default Twenty theme and then check again. This is a temporary activity just to locate the issue.
Let us know if your issue still persists after performing these temporary activities.
Thanks & Regards,