media library disappears when installing lms wordpress theme

I bought the LMS wordpress theme, and when I installed the 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


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