X variable default value is unassigned or Never used errors

Possible solution step-by-step:

1. Open the folder containing the Playable Plugin Plugin
2. Navigate to pipeline/templates/LunaCompiler/Scripts
3. Open up Scripts.csproj.template
4. Where it says <NoWarn>CS0626</NoWarn> replace it with <NoWarn>CS0626;CS7036;CS0649;CS0169;CS0414</NoWarn>