Can't created categories and menus in new sub-site created

Hi,

We want to make a multi language site and we use a multilingual plugin as you said here

https://premium.wpmudev.org/forums/topic/wpml-compatibility-with-upfront

We created a new site webps.es/ca based on webps.es. When we want to create a new category or menu in the new site, the element after created disappeared, but there is one element there, you can see the screenshot.

Could you help us with this.

Regards.