Discord Bot - The input text has too few parameters

Question

When I execute my command I got the error

"The input text has too few parameters"

all I want to do is an info command. I already know that "socketMessage.Author" is causing the error but not exactly why.

Can someone could tell me how to correct the error "The input text has too few parameters " given by "socketMessage.Author" ?

btw I use Discord.NET

Here's what I have for the info command :

[Command("info")]
[Alias("userinfo")]
public async Task InfoAsync(SocketMessage socketMessage, SocketGuildUser? socketGuildUser = null)
{
    if (socketGuildUser == null)
    {
        socketGuildUser = Context.User as SocketGuildUser;
    }

    var embed = new EmbedBuilder()
        .WithTitle($"Info of {socketGuildUser.Username}#{socketGuildUser.Discriminator}")
        .AddField("ID :", $"`{ socketGuildUser.Id}`", true)
        .AddField("Name :", $"`{socketGuildUser.Username}#{socketGuildUser.Discriminator}`", true)
        .AddField("Created at :", $"`{socketGuildUser.CreatedAt}`", true)
        .AddField("Joined at :", $"`{socketGuildUser.JoinedAt}`")
        .AddField("Voice info", "`>>>`")
        .AddField("Voice channel :", $"`{socketGuildUser.VoiceChannel}`", true)
        .AddField("Voice session ID :", $"`{socketGuildUser.VoiceSessionId}`", true)
        .WithThumbnailUrl(socketGuildUser.GetAvatarUrl() ?? socketGuildUser.GetDefaultAvatarUrl())

        .WithFooter("Information requested by :", $"{socketMessage.Author}")
            .WithCurrentTimestamp()
            .WithColor(new Color(41, 129, 207))
            .Build();

    await ReplyAsync(embed: embed);
}