Parameter #1 $string of function md5 expects string, string|false given.

Parameter #1 $string of function md5 expects string, string|false given.

Parameter #1 $key of function array_key_exists expects int|string, string|null given.

Parameter #2 $array of function array_key_exists expects array, mixed given.

Cannot access offset string|null on mixed.

Parameter #1 $transaction_id of class Pronamic\WordPress\Pay\Gateways\OmniKassa2\RefundRequest constructor expects string, string|null given.

Dead catch - Pronamic\WordPress\Pay\Gateways\OmniKassa2\UnknownOrderIdsException is never thrown in the try block.