The /wp-content folder is missing some or all of its content

First, activate any other available theme (such as TwentySeventeen) under Appearance → Themes.

Then download this file and unzip it on your computer.

Once the file is unzipped, you should have a folder named thesis, which contains several different folders and files.

Access your server (preferably by using an FTP program), and navigate to the /wp-content/thesis/ folder.

Now, select all of the folders and files inside the thesis folder on your computer, and upload them to the /wp-content/thesis/ folder on your server.

Once that’s done, reactivate Thesis again under Appearance → Themes.

If these instructions didn’t work for you, here are the most common reasons why:

• You uploaded the thesis folder, rather than only its contents.
• You uploaded to the /wp-content/themes/thesis/ folder instead.