Normal - UEFN Verse - When multiple people have the same canvas applied to them it'll remove it off the first. Only one person at a time can have the canvas.

[MySTiKGuy]

I almost succeed to correct this problem. I had the same issue, when a second player log in it stole the UI from the last one who did it.

So I followed this tutorial :

4. Managing and Displaying the Score

Here’s my class code:

using { /Fortnite.com/Devices }
using { /Fortnite.com/UI }
using { /UnrealEngine.com/Temporary/SpatialMath }
using { /UnrealEngine.com/Temporary/UI }
using { /Verse.org/Simulation }

# See https://dev.epicgames.com/documentation/en-us/uefn/create-your-own-device-in-verse for how to create a verse device.

MakeGameUI<constructor><public>(InPlayer : agent) := game_ui:
    MaybePlayer := option{InPlayer}
    MaybePlayerUI := option{GetPlayerUI[player[InPlayer]]} 

# A Verse-authored creative device that can be placed in a level
game_ui := class():
    var MyCanvas<internal> : canvas = canvas{}
    LapsCountWidget<internal> : button_loud = button_loud{}

    MaybePlayer<internal> : ?agent = false
    MaybePlayerUI<internal> : ?player_ui = false

    ScoreManagerDevice<internal> : score_manager_device = score_manager_device{}
    
    LapsText<localizes>(NbLaps : int) : message = "Laps {NbLaps} of 10"
    LapsTextDefaut<localizes>() : message = "No Lap Started Yet !"
    var TotalLaps<private> : int = 0

    block: 
        set MyCanvas = canvas:
            Slots := array:
                canvas_slot:
                    Anchors := anchors{Minimum := vector2{X := 0.5, Y := 0.0}, Maximum := vector2{X := 0.5, Y := 0.0}}
                    Offsets := margin{Top := 100.0, Left := 0.0, Right := 0.0, Bottom := 0.0}
                    Alignment := vector2{X := 0.5, Y := 0.5}
                    SizeToContent := true
                    Widget := LapsCountWidget

    UpdateInitialUI<private>(): void =
        if (PlayerUI := MaybePlayerUI?):
            LapsCountWidget.SetText(LapsTextDefaut())

    UpdateUI<private>(): void =
        if (PlayerUI := MaybePlayerUI?):
            LapsCountWidget.SetText(LapsText(TotalLaps))

    AddGameUIToUI<public>() : void =
        if (PlayerUI := MaybePlayerUI?):
            PlayerUI.AddWidget(MyCanvas)
    
            UpdateInitialUI()

    UpdateLapCount<public>(Points : int) : void =
        set TotalLaps = Points
        UpdateUI()

In my other file that track the game I have this code:

OnPlayerSpawn(InPlayer : agent) : void=
        #Print("A player just spawned!")
        if(PlayerLap := TotalOfLaps[InPlayer], Player := player[InPlayer]):

        else if (Player := player[InPlayer]):    
            set GameUI = MakeGameUI(InPlayer)
                  
            if(set TotalOfLaps[Player] = 0):
                GameUI.AddGameUIToUI()  

    HandleCheckpointCompleted(Agent:agent):void=
        if (Player := player[Agent], LapOfPlayer = TotalOfLaps[Player]):
            set LapOfPlayer = LapOfPlayer + 1
        if (Player := player[Agent], set TotalOfLaps[Player] = LapOfPlayer):
            GameUI.UpdateLapCount(LapOfPlayer)

With this code, every player have the custom UI, the only problem that it update only the one of the last player that Has spawn.

When I succeed to correct this problem, I’ll post the final result