List of steps to reproduce (step by step, including full links if applicable):

• Upload an image.

What happens?
Thumbnails are broken and opening them by URL results in (regardless of logged in (bureaucrat or administrator) or logged out):

Unauthorized

This server could not verify that you are authorized to access the document you requested.

Using an image via [[File:Ulefone DuraSpeed Settings Android 10.png||]] works, but specifying a size e.g. [[File:Ulefone DuraSpeed Settings Android 10.png|200px|]] results in a broken thumbnail as well.

What should have happened instead?
Thumbnails should be accessible, as the original file is.

Browser information, screenshots and other applicable information:

• Example file: https://signal.miraheze.org/wiki/File:Ulefone_DuraSpeed_Settings_Android_10.png
• Inaccessible thumbnail: https://static.miraheze.org/signalwiki/thumb/a/a2/Ulefone_DuraSpeed_Settings_Android_10.png/378px-Ulefone_DuraSpeed_Settings_Android_10.png
• Accessible original file: https://static.miraheze.org/signalwiki/a/a2/Ulefone_DuraSpeed_Settings_Android_10.png