Bug Lobby Joining Error

So basically whenever I enter lobby code to join lobby, sometimes it works but sometimes it gives me exception. Please help me: This is the error:

Multiplayer QuickJoinLobby Esxception at Unity.Services.Lobbies.Internal.WrappedLobbyService.ResolveErrorWrapping (Unity.Services.Lobbies.LobbyExceptionReason reason, System.Exception exception) [0x0009d] in C:\Unity Projects\CopChase\CopChase\Library\PackageCache\com.unity.services.lobby@1.1.2\Runtime\SDK\WrappedLobbyService.cs:459
at Unity.Services.Lobbies.Internal.WrappedLobbyService.TryCatchRequest[TRequest,TReturn] (System.String api, System.Func`3[T1,T2,TResult] func, TRequest request) [0x000db] in C:\Unity Projects\CopChase\CopChase\Library\PackageCache\com.unity.services.lobby@1.1.2\Runtime\SDK\WrappedLobbyService.cs:402
at Unity.Services.Lobbies.Internal.WrappedLobbyService.JoinLobbyByCodeAsync (System.String lobbyCode, Unity.Services.Lobbies.JoinLobbyByCodeOptions options) [0x000a1] in C:\Unity Projects\CopChase\CopChase\Library\PackageCache\com.unity.services.lobby@1.1.2\Runtime\SDK\WrappedLobbyService.cs:161
at Unity.Services.Lobbies.Internal.WrappedLobbyService.JoinLobbyByCodeAsync (System.String lobbyCode, Unity.Services.Lobbies.JoinLobbyByCodeOptions options) [0x001c7] in C:\Unity Projects\CopChase\CopChase\Library\PackageCache\com.unity.services.lobby@1.1.2\Runtime\SDK\WrappedLobbyService.cs:177
at MultiplayerManager.QuickJoinLobby (System.String code) [0x00047] in C:\Unity Projects\CopChase\CopChase\Assets\scripts\MultiplayerManager.cs:237
UnityEngine.Debug:Log (object)
MultiplayerManager/<QuickJoinLobby>d__35:MoveNext () (at Assets/scripts/MultiplayerManager.cs:251)
System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1<Unity.Services.Lobbies.Models.Lobby>:SetException (System.Exception)
Unity.Services.Lobbies.Internal.WrappedLobbyService/<JoinLobbyByCodeAsync>d__15:MoveNext () (at Library/PackageCache/com.unity.services.lobby@1.1.2/Runtime/SDK/WrappedLobbyService.cs:177)
System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1<Unity.Services.Lobbies.Response`1<Unity.Services.Lobbies.Models.Lobby>>:SetException (System.Exception)
Unity.Services.Lobbies.Internal.WrappedLobbyService/<TryCatchRequest>d__26`2<Unity.Services.Lobbies.Lobby.JoinLobbyByCodeRequest, Unity.Services.Lobbies.Models.Lobby>:MoveNext () (at Library/PackageCache/com.unity.services.lobby@1.1.2/Runtime/SDK/WrappedLobbyService.cs:433)
System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1<Unity.Services.Lobbies.Response`1<Unity.Services.Lobbies.Models.Lobby>>:SetException (System.Exception)
Unity.Services.Lobbies.Apis.Lobby.LobbyApiClient/<JoinLobbyByCodeAsync>d__15:MoveNext () (at Library/PackageCache/com.unity.services.lobby@1.1.2/Runtime/Apis/LobbyApi.cs:478)
System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1<Unity.Services.Lobbies.Http.HttpClientResponse>:SetResult (Unity.Services.Lobbies.Http.HttpClientResponse)
Unity.Services.Lobbies.Http.HttpClient/<MakeRequestAsync>d__1:MoveNext () (at Library/PackageCache/com.unity.services.lobby@1.1.2/Runtime/Http/HttpClient.cs:41)
System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1<Unity.Services.Lobbies.Http.HttpClientResponse>:SetResult (Unity.Services.Lobbies.Http.HttpClientResponse)
Unity.Services.Lobbies.Http.HttpClient/<CreateWebRequestAsync>d__3:MoveNext () (at Library/PackageCache/com.unity.services.lobby@1.1.2/Runtime/Http/HttpClient.cs:56)
System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1<Unity.Services.Lobbies.Http.HttpClientResponse>:SetResult (Unity.Services.Lobbies.Http.HttpClientResponse)
Unity.Services.Lobbies.Http.HttpClient/<CreateHttpClientResponse>d__4:MoveNext () (at Library/PackageCache/com.unity.services.lobby@1.1.2/Runtime/Http/HttpClient.cs:84)
System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1<Unity.Services.Lobbies.Http.HttpClientResponse>:SetResult (Unity.Services.Lobbies.Http.HttpClientResponse)
Unity.Services.Lobbies.Http.HttpClient/<>c__DisplayClass4_0/<<CreateHttpClientResponse>b__0>d:MoveNext () (at Library/PackageCache/com.unity.services.lobby@1.1.2/Runtime/Http/HttpClient.cs:81)
System.Threading.Tasks.TaskCompletionSource`1<Unity.Services.Lobbies.Http.HttpClientResponse>:SetResult (Unity.Services.Lobbies.Http.HttpClientResponse)
Unity.Services.Lobbies.Http.UnityWebRequestHelpers/<>c__DisplayClass0_0:<GetAwaiter>b__0 (UnityEngine.AsyncOperation) (at Library/PackageCache/com.unity.services.lobby@1.1.2/Runtime/Http/UnityWebRequestHelpers.cs:34)
UnityEngine.AsyncOperation:InvokeCompletionEvent ()



This is the code:

async Task CreateLobby()
{
canvasmanager.HostedIpAddressText.text = "loading..";
try
{
Allocation allocation = await AllocationRelay();
string relayJoinCode = await GetRelayJoinCode(allocation);
lobbyName = RandomLobbyName();
CreateLobbyOptions options = new CreateLobbyOptions {
IsPrivate = false,
Player = player(),
Data = new Dictionary<string, DataObject>
{{k_keyJoinCode, new DataObject(DataObject.VisibilityOptions.Public,relayJoinCode)}},
};
currentlobby = await LobbyService.Instance.CreateLobbyAsync(lobbyName, 2,options);
heartbeatTimer.Start();
pollForUpdatesTimer.Start();
canvasmanager.HostedIpAddressText.text = "loading..";
Debug.Log("Multiplayer CreateLobby Name: " + currentlobby.Name + " with code " + currentlobby.LobbyCode);
JoinLobbyCode = currentlobby.LobbyCode;
canvasmanager.HostedIpAddressText.text = JoinLobbyCode;
sharecodetext.text = JoinLobbyCode;
NetworkManager.Singleton.GetComponent<UnityTransport>().SetRelayServerData(new RelayServerData(allocation, connectionType));
NetworkManager.Singleton.StartHost();
PrintPlayersHost();
Debug.Log("Multiplayer CreateLobby LobbyCode: " + JoinLobbyCode + " RelayCode: " + relayJoinCode);
}
catch (LobbyServiceException e)
{
Debug.Log("Multiplayer CreateLobby Exception: " + e);
CreateLobby();
}

}

async Task QuickJoinLobby(string code)
{
try
{
JoinLobbyByCodeOptions joinLobbyByCodeOptions = new JoinLobbyByCodeOptions
{
Player = player(),
};
currentlobby = await LobbyService.Instance.JoinLobbyByCodeAsync(code,joinLobbyByCodeOptions);
pollForUpdatesTimer.Start();
Debug.Log("Multiplayer QuickJoinLobby CurrentLobby: " + currentlobby.Id);
canvasmanager.HostedIpAddressText.text = code;
sharecodetext.text = code;
string relayJoinCode = currentlobby.Data[k_keyJoinCode].Value;
JoinAllocation joinAllocatiion = await JoinRelay(relayJoinCode);
NetworkManager.Singleton.GetComponent<UnityTransport>().SetRelayServerData(new RelayServerData(joinAllocatiion, connectionType));
NetworkManager.Singleton.StartClient();
PrintPlayersHost();
Debug.Log("Multiplayer QuickJoinLobby LobbyCode: " + code + " RelayCode: " + relayJoinCode);
}
catch(LobbyServiceException e)
{
Debug.Log("Multiplayer QuickJoinLobby Esxception " + e.StackTrace);
}
}

 

Someone Please help me