Can't Get Unicon Theme to Install

I’m trying to get the theme to install. It goes through the process, hits 100% and then gives me this message:

Are you sure you want to do this?

Please try again.

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When I click on Please try again, it just refreshes and takes me back to the main themes page.

I had no trouble installing the child theme – it’s the parent theme that isn’t installing. Can you help? I see that another user was able to figure out the solution, but didn’t mention what it was. So I’m not sure how to resolve.

This is the back part of the URL where it’s happening: wp-admin/update.php?action=upload-theme

Thanks!

Ticket