Hi there,

Thanks for contacting us. Sorry for the inconvenience. Will you please provide me the Joomla administrator access to check the issue? I will check & get back to you soon. 

-Thanks

OK, thanks

I have checked the feature box addon and it works fine.

working in a new page, but not in the page i created before

check this, i can´t make changes

I have checked and no issue found

ok, the problem is in the backend. I can make changes in the frontend. thanks

I also checked backend and forget to capture screencast. If you want, I will share with you screencast for backend.

not necessary. thanks again.

You are most welcome :)