How can i make this layout?

So what should i do?

It's usually created by the cache plugin.

If you don't have a cache plugin check with your host.

Try contact the cache plugin support or your host for a solution.

My host/cache plugin is the same company. their support said its related to the theme.
its in the theme folder https://ibb.co/m05BWLJ.

No, it's definitely not added by GP.

There will only be functions.php, style.css, screenshot.png(GP logo) 3 files in a fresh installed child theme's folder:
https://www.screencast.com/t/grfBXQclCae

Fixed it was my cache plugin as yo u said.
i disable minify css and combine css

Your host seems not very familiar with their product :)