Return type of OCA\TwoFactorGateway\Provider\State::jsonSerialize() error

[oleua]

Hi! I am getting error in nextcloud journal

Return type of OCA\TwoFactorGateway\Provider\State::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice at /var/www/html/nextcloud/apps/twofactor_gateway/lib/Provider/State.php#125

referencing to

public function jsonSerialize() {
                return [
                        'gatewayName' => $this->gatewayName,
                        'state' => $this->state,
                        'phoneNumber' => $this->identifier,
                ];
        }

[vitormattos]

This issue has already been resolved in my fork, but my goal is to bring the updates back to the main repository so that the whole community can benefit directly.
Since the app currently has no maintainer, I’ve also offered to take care of its development here:

• Looking for a new maintainer #454 (comment)

If you’d like to see this app updated and maintained, it would be really helpful if you could also add your support in that discussion. That way, it will be clearer to the Nextcloud team that this app is still important for the community.