Blank Page after remove demo product categories

I imported DEMO number 6, and when i made all changes, i have blank page error, and all what i constructed with the bakery plugin collapse, all what i´ve done just disappear.

I noticed when edit product category, cause store is in spanish, and tried to rename slug, all my design disappear.

this is the web page: https://porteo.com.mx/

I just need to remove the demo product categories or rename them and problem appear

Try just to rename one category an blank page will come