Process completed with exit code 1.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Non-nullable property 'OnDiagnosticMessage' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'OnDiscoveryComplete' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'OnErrorMessage' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'OnExecutionComplete' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.