The "--output" option isn't supported when building a solution. Specifying a solution-level output path results in all projects copying outputs to the same directory, which can lead to inconsistent builds.

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

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

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

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

Possible null reference return.

Possible null reference return.

Possible null reference return.

Possible null reference return.