Target "Compile" has thrown an exception

Process completed with exit code 255.

/home/runner/work/BlazeKit/BlazeKit/src/BlazeKit/Layout/ClosestLayout.cs(145,38): warning CS8600: Converting null literal or possible null value to non-nullable type. [/home/runner/work/BlazeKit/BlazeKit/src/BlazeKit/BlazeKit.csproj]