error while handling the command application command registry

public override registerApplicationCommands(registry: Command.Registry) {
    registry.registerChatInputCommand((builder) =>
        builder
            .setName(this.name)
            .setDescription(this.description)
            .addStringOption((option) => option.setName('hello').setDescription('hello').setRequired(true))
    );
}

public override registerApplicationCommands(registry: Command.Registry) {
    registry.registerChatInputCommand((builder) =>
        builder
            .setName(this.name)
            .setDescription(this.description)
            .addStringOption(new SlashCommandStringOption().setName('hello').setDescription('hello').setRequired(true))
    );
}