# InstallBrandEssentialsSelfhostedFontFormatError > Type in domain **Brand Essentials** - HTML: [InstallBrandEssentialsSelfhostedFontFormatError.html](InstallBrandEssentialsSelfhostedFontFormatError.html) - Raw SDL: [InstallBrandEssentialsSelfhostedFontFormatError.sdl](InstallBrandEssentialsSelfhostedFontFormatError.sdl) - Covered by: [llms.txt](../llms.txt) ## Fields - `fileId`: `ID!` _(beta)_ — The file Id of the font format that could not be installed. - `code`: `InstallBrandEssentialsSelfhostedFontFormatErrorCode!` _(beta)_ — The machine readable reason why the font format could not be installed. - `message`: `String!` _(beta)_ — A human readable description of the reason. ## Related mutations - [`installBrandEssentialsSelfhostedFontFormats`](../mutation/installBrandEssentialsSelfhostedFontFormats.md)