Property Dflydev\EventSauce\Support\Testing\GivenWhenThen\Scenario::$payloadSerializer is never written, only read.

Parameter #1 $event of method EventSauce\EventSourcing\Serialization\PayloadSerializer::serializePayload() expects object, mixed given.

Parameter #1 $json of function json_decode expects string, string|false given.

Parameter #1 $className of method EventSauce\EventSourcing\Serialization\PayloadSerializer::unserializePayload() expects class-string<object>, class-string|false given.

Parameter #1 $object of function get_class expects object, mixed given.

Parameter #2 $payload of method EventSauce\EventSourcing\Serialization\PayloadSerializer::unserializePayload() expects array, mixed given.