NullReferenceException in iOS only

I am getting a runtime error: System.NullReferenceException: Object reference not set to an instance of an object When i click on Sign in button. the error is occurring at this step (PCA is null):

PCA = new PublicClientApplication(ClientID)
                {
                    RedirectUri = $"msal{App.ClientID}://auth",
                };  

Complete Error:

System.NullReferenceException: Object reference not set to an instance of an object at Microsoft.Identity.Core.TokenCacheAccessor.GetTeamId () [0x0003f] in <772466974f16475694ca93a5f7a70108>:0 at Microsoft.Identity.Core.TokenCacheAccessor..ctor () [0x0001c] in <772466974f16475694ca93a5f7a70108>:0 at Microsoft.Identity.Core.Telemetry.TelemetryTokenCacheAccessor..ctor () [0x00000] in <772466974f16475694ca93a5f7a70108>:0 at Microsoft.Identity.Client.TokenCache..ctor () [0x00000] in <772466974f16475694ca93a5f7a70108>:0 at Microsoft.Identity.Client.PublicClientApplication..ctor (System.String clientId, System.String authority) [0x00014] in <772466974f16475694ca93a5f7a70108>:0 at Microsoft.Identity.Client.PublicClientApplication..ctor (System.String clientId) [0x00000] in <772466974f16475694ca93a5f7a70108>:0 at UserDetailsClient.App..ctor () [0x00009] in Downloads/active-directory-xamarin-native-v2-master/UserDetailsClient/UserDetailsClient/App.cs:30

Only iOS is giving me this . Android Version is working fine. I am using Visual Studio for Mac

[tipa]

I was able to worked around the issue with the following hack:

var whenUnlockedAccessRecord = new SecRecord(SecKind.GenericPassword) { Service = "", Account = "teamIDHint" };
var match = SecKeyChain.QueryAsRecord(whenUnlockedAccessRecord, out SecStatusCode resultCode);
if (resultCode == SecStatusCode.Success && match.Accessible != SecAccessible.Always)
{
    SecKeyChain.Remove(whenUnlockedAccessRecord);
}

if (match?.Accessible != SecAccessible.Always)
{
    var alwaysAccessRecord = new SecRecord(SecKind.GenericPassword) { Service = "", Account = "teamIDHint", Accessible = SecAccessible.Always };
    SecKeyChain.Add(alwaysAccessRecord);
}

Speaking of hack: I must say that the GetTeamId() method looks pretty hacky too 😛

[ali-h2010]

@jennyf19 I tested and it works out of the box as expected. Great work