It seems like $execution can also be of type null; however, parameter $execution of Oliverde8\PhpEtlBundle\S...:executeFromEtlEntity() does only seem to accept Oliverde8\PhpEtlBundle\Entity\EtlExecution, 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