As indicated by the "Forge" tag in the filename, this mod is intended to be loaded via the Minecraft Forge modding API. It is not a standalone executable and cannot be run by double-clicking. To function correctly, the file must be placed into the mods folder within the Minecraft game directory.
: For those not using TLauncher, similar systems like Ely.by or CustomSkinLoader provide nearly identical functionality for other "cracked" or custom launchers. File name- TL-Skin-and-Cape-Mod-Forge-1.20.1.jar