This line, fail if $value is null

protected function hasMarker(string $value) : bool

Argument 1 passed to Shapecode\NYADoctrineEncryptBundle\Encryption\EntityEncryption::
hasMarker() must be of the type string, null given, called in /vendor/shapecode/nya-doctrine-encrypt-bundle/src/Encryption/EntityEncryption.php on line 93

Solution are:

• check value before passing to that function
• change signature of method in protected function hasMarker(?string $value) : bool