Missing stylesheet on a pre-existing theme

Hello there,

I’m sure this is a very newbie question, so I apologize for that in advance. But I was attempting to download a pre-existing theme from wordpress (specifically “Adventure Journal”) and it failed and gave me the following error:

The following themes are installed but incomplete. Themes must have a stylesheet and a template.

I’ve tried to reinstall it and it says:

Unpacking the package…

Installing the theme…

Destination folder already exists. /hermes/web10/b278/moo.loveandlearningchild/announcements/wp-content/themes/adventure-journal/

Theme install failed.

I tried downloading a different theme and it worked just fine. However, unfortunately, this specific theme is the one I need. Any ideas on how to fix this?