Deprecated Call:
Argument in add_options_page()
Used in wp-content/plugins/your-custom-css/your-custom-css.php on line 105.

Alternative Recommend:
Usage of user levels by plugins and themes is deprecated. Use roles and capabilities instead.
Deprecated in version 2.0.

Can you take a look at this and update accordingly. Love your plugin and have been using it for quite some time.

Thanks,

Ron

https://www.ads-software.com/plugins/your-custom-css/

Installed the plugin, but the custom CSS wasn’t added to the header.