The application was launched without Administrator Privileges.In case of the error code 1, these are the possible situations that can cause the SkyUI Error Code 1 when the SKSE64.exe is launched on Windows: If there are certain troublesome factors that can prevent you from launching and using the SkyUI mod installer, you will face a small window that specifies the error code of the problem and some details about the issue. The Skyrim Script Extender is used to add mods and includes more functions to the Elder Scrolls V: Skyrim video game on a computer. What causes the SkyUI Error Code 1 issue? Shift the game folder to a new location.Reinstall the Skyrim Script Extender application.Run SKSE64 with administrator privileges.Fixing the SkyUI Error Code 1 on Windows.What causes the SkyUI Error Code 1 issue?.