Well, I added

// @license     CC-BY-NC-SA-4.0; https://creativecommons.org/licenses/by-nc-sa/4.0/

and got

@license is not OSI primary and compatible in the metadata block(s).

Hello again, EH updated its system* and your userscript is broken but also prevent me from using the favorite, renaming and expunging systems.

• https://forums.e-hentai.org/index.php?showtopic=213374

Hello, since the new version of EH (https and url structure change I think), your userscript is broken.