Hello,
Thank you very much for choosing our theme and for contacting us.
This error is not caused by our theme. Please contact the host support and show them the screen. The reason may be either lack of appropriated capacity or damaged folder you are trying to upload.
As soon as you install the theme, navigate to Appearance > Install plugins, try to install all. Please note that you can activate only one builder either WP Bakery page builder either Elementor.
If you have any problems, provide the net WordPress installation access, specify the builder you want to use I shall help.
The best plugin to migrate site from one host to another is the free All in one WP migrate.
Best Regards