Need help, pages modifications erase when I update

Hello! I’m with Top Model theme. (http://agencestepup.com)

I’m trying to upades the pages with my own content after add the demo. It was ok yesterday but today nothing, I’m here for about 1 hour and don’t find any answer about that.
I’m with default editor of visual composer. When I press updates (mise a jour), all the modification to the text I just made erase and come back to what was in before.

Can you help?
Thank you

Hi

Please contact theme Author and let them know How to Contact your purchased Item Author, theme author will be happy to assist you.

Thanks