It seems like $previous can also be of type Throwable; however, parameter $code of Exception::__construct() does only seem to accept integer, maybe add an additional type check?
(
Ignorable by Annotation
)
If this is a false-positive, you can also ignore this issue in your code via the ignore-type annotation
21
parent::__construct("Index/property is not sortable: {$this->address}", /** @scrutinizer ignore-type */ $previous);