Attempting to enroll a Snow Atlas Extender which resulted in the following error:

See the end of this message for details on invoking

just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************

System.Threading.Tasks.TaskCanceledException: A task was canceled.

at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)

at SnowSoftware.Extender.Common.Platform.PlatformHandler.<EnsureAuthenticated>d__30.MoveNext() in C:\Users\circleci\project\src\SnowSoftware.Extender.Common\Platform\PlatformHandler.cs:line 227

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)

at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

at SnowSoftware.Extender.Configurator.Views.EnrollmentDialog.<buttonEnroll_Click>d__8.MoveNext()

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c.<ThrowAsync>b__6_0(Object state)

This issue was due TLS error 10011. All other older version of TSL / SSL was disabled and TLS 1.2 / 1.3 was enabled.

'SchUseStrongCrypto' was enabled. 

Removing TLS 1.3 fixed this issue. I think the reason that TLS 1.3 is not working because it is missing the following Cipher suites:

TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256

TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256

https://docs.microsoft.com/en-us/answers/questions/788543/windows-2019-server-and-ciphers.html

https://docs.snowsoftware.com/snow-system-requirements/en/UUID-48de9fe2-f48f-99c5-b3e8-4fbc4ea92402.html

Log Name:   System

Source:    Schannel

Date:     9/15/2022 10:33:45 AM

Event ID:   36871

Task Category: None

Level:     Error

Keywords:    

User:     SYSTEM

Computer:   xxxxxxxxxxxxxxxxxxxxx

Description:

A fatal error occurred while creating a TLS client credential. The internal error state is 10011.

Event Xml:

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">

 <System>

  <Provider Name="Schannel" Guid="{1f678132-5938-4686-9fdc-c8ff68f15c85}" />

  <EventID>36871</EventID>

  <Version>0</Version>

  <Level>2</Level>

  <Task>0</Task>

  <Opcode>0</Opcode>

  <Keywords>0x8000000000000000</Keywords>

  <TimeCreated SystemTime="2022-09-15T15:33:45.925198900Z" />

  <EventRecordID>564767</EventRecordID>

  <Correlation ActivityID="{b3fce036-c917-0000-49e3-fcb317c9d801}" />

  <Execution ProcessID="916" ThreadID="2784" />

  <Channel>System</Channel>

  <Computer>xxxxxxxxxxxxxxxxxxxxx</Computer>

  <Security UserID="S-1-5-18" />

 </System>

 <EventData>

  <Data Name="Type">client</Data>

  <Data Name="ErrorState">10011</Data>

 </EventData>

</Event>

Extender GUI error:

A temporary solution might be to remove TLS 1.3 from the Windows registry and restart.   You would also need to ensure that the GPO (Group Policy Object) is not pushing TLS 1.3 upon start-up.

To use TLS 1.3 you would need to ensure you have the right Cipher suites

This issue was due TLS error 10011. All other older version of TSL / SSL was disabled and TLS 1.2 / 1.3 was enabled.