I apologize if this isn't the best place to ask this - I'm not sure if this is a uSkinned issue or Umbraco issue.. I keep getting this error when trying to save and publish any changes to my design theme using uSkinned 5.2.0 on Umbraco 12.3 Error logs show USN Error: Stylesheet generation - "The input string 'rg' was not in a correct format." SourceContext='USNSiteBuilder.Core.Helpers.Frontend.DesignStyleService' Umbraco.Cms.Web.BackOffice.Controllers.ContentController.PostSave (Umbraco.Web.BackOffice) Any advice? thanks!

No help, but from the error message it for sure looks to be a uSkinned issue and not Umbraco 🙂

I ended up just moving everything into my theme CSS file instead of as a property value in the uSkinned stuff in the Back Office.. no fuss, no muss 🙂