imdb.single.user.css cannot be installed via Stylus because it is missing metadata

[darkred]

Greetings

The issue is that imdb.single.user.css cannot be installed via Stylus because it is missing metadata.
Using Stylus beta 1.5.46 with Chrome 125. When I'm trying to install the userCSS I'm getting:

Stylus failed to parse UserCSS:
Could not find metadata.

Screenshot:

Thank you

[lazuratus]

Installing the .css is not needed as it is loaded by the UserScript, but, I guess it would be a good idea to add UserCSS header to the .css so that it can be installed and modified by anyone who wishes to do so.