The method systemEnvironment() does not exist on Micro\Component\EventEmitter\EventInterface. It seems like you code against a sub-type of Micro\Component\EventEmitter\EventInterface such as Micro\Kernel\App\Busines...tionReadyEventInterface.
(
Ignorable by Annotation
)
If this is a false-positive, you can also ignore this issue in your code via the ignore-call annotation