media library disappears when installing lms wordpress theme

Hello,
I bought the LMS wordpress theme, and when I installed the lms.zip file, it worked fine, but after activating the theme, the media library disappeared. Before activating the theme the library is present and I can see the images that I had uploaded, but at the moment of activating they disappear, but if I deactivate again, the theme appears again.
I have the latest version of wordpress installed, and no plugins installed.
what’s going on?
I have uninstalled the theme, reinstalled wordpress and reinstalled lms and the problem always appears.
I need a solution.
Thank you

Hi,

Please contact your purchased theme author, theme author will assist you.

How to contact an author to get support or for any technical query:

Thanks