Email validation error

Does anyone know what this is?

Code:

ErrorException: Fatal Error: Declaration of Egulias\EmailValidator\Validation\MessageIDValidation::isValid(string $email, Egulias\EmailValidator\EmailLexer $emailLexer): bool must be compatible with Egulias\EmailValidator\Validation\EmailValidation::isValid($email, Egulias\EmailValidator\EmailLexer $emailLexer) src/vendor/egulias/email-validator/src/Validation/MessageIDValidation.php:23

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