I updated the new version of wordpress and came the plugin “Gutemberg”. After the installation the administrative area was completely unconfigured when we will create a page or a new post.
Wordpress has already warned that the next update will be native.
Are you already thinking of something to not disconfigure the gillion theme?
I have tested it on my test site and it’s working fine for me using latest version of Gillion theme as displayed in the attached screenshot.
This can be due to plugin conflict on your site so please try temporary deactivating all plugins except Unyson & WPBakery page builder plugins and see whether everything works fine and then enable the plugins one by one to see which plugin is conflicting if any.