The following images seem to be missing:

• https://r.rpol.net/images//scroll-up.svg
• https://r.rpol.net/images//scroll-down.svg

Location: Main page, logged in user.

Note the double slashes between "images" and the actual filename.  Compare to the same inside a game or forum thread, which works as expected:

• https://r.rpol.net/images/dark/scroll-up.svg
• https://r.rpol.net/images/dark/scroll-down.svg