Hello, @Muhammad Usaid,
1- When I check your issue in the slider revolution it is working fine as you can see in this video: https://streamable.com/w13kys
Please check back to your issue after clearing the browser cache.
2- When I try to update anything on the WPBakery edit page when I press the update button the “403” error appears on the page see here: https://postimg.cc/HjkfrpfT This error is usually from the hosting so you have to contact your service provider (Hosting) in order to solve your issue.
Regards 8Themes Team.