Server-side:
import { ArraySchema, Schema, type } from "@colyseus/schema";

export class Profile extends Schema {
@type("string")
uid: string = '';

@type("string")
nickname: string = '';

@type("number")
avatar: number = 0;

@type("number")
score: number = 0;

@type("number")
exp: number = 0;

@type("number")
level: number = 0;

};

export class Gamer extends Schema {

/// BUG !!!

@type(Profile)
profile: Profile = new Profile();

@type(["number"])
cards = new ArraySchema<number>();

@type("number")
coins: number = 0;

@type("number")
chips: number = 0;

@type("number")
prize: number = 0;

@type("number")
seat: number = -1;

};

client-side:

using Colyseus.Schema;

namespace Poker.Entities {

/// <summary>
/// Represent gamer datas other gamers could see
/// </summary>


public class Profile : Schema {
    
    [Type(0, "string")]
    public string uid = default(string);
    
    [Type(1, "string")]
    public string nickname = default(string);

    [Type(2, "number")]
    public float avatar = default(float);

    [Type(3, "number")]
    public float score  = default(float);

    [Type(4, "number")]
    public float exp  = default(float);

    [Type(5, "number")]
    public float level  = default(float);
    
}


/// <summary>
/// Instance of user in holdem game
/// </summary>
public class Gamer : Schema
{
    [Type(0, "Profile", typeof(Profile))]
    public Profile profile = new Profile();
    
    [Type(1, "array", typeof(ArraySchema<float>))]
    public ArraySchema<float> cards = new ArraySchema<float>();
    
    [Type(2, "number")]
    public float coins  = default(float);

    [Type(3, "number")]
    public float chips  = default(float);

    [Type(4, "number")]
    public float prize  = default(float);

    [Type(5, "number")]
    public float seat  = default(float);
    

}

}

I believe the problem comes from Profile but don't know how to solve that. Thanks.

I'm sorry you're getting this, there is an explanation and how to fix this here: https://github.com/colyseus/colyseus-unity3d/issues/131

This usually happens when you have multiple state/room definitions and use the global type imported from @colyseus/schema. We'd like to fix this on a next version to display warnings instead of throwing errors when this happens!

Let me know if the solution described on GitHub works for you! Cheers!

Can you share your schemas/room structures you have on the server? There are two things you could try that will potentially fix this:

• Remove any unnecessary room/schema structures that you are not using
• Use const type = Context.create(), and use the same type reference for annotating your schema classes.

Looking forward to hear from you!

Should be
[Type(0, "ref", typeof(A))]
public A a = new A();