Sorry to hear that you’re having an issue with the migrated site. The background image markup is empty in the frontend as well as in the builder though the image was set. This means there’s a problem with the background image output which persists even creating a new section and setting an image background.
With that said, this is an issue with the server setup. What the specific cause is still unknown to me so we need to investigate further. That will take time though so would you mind test migrating to a different server setup. I mean you’re currently using Litespeed server. would you mind migrating to Apache or Nginx?
Please also give us the following info in a Secure Note.
- FTP details for the current setup with issue.
- WordPress Login URL
- WP Admin username and password (please set a new one as you have posted credentials publicly and which means other people could now login to your test site)