sharepoint online – Failed to execute MS Graph backend request GetGroupInternalApiRequest

In my project, there is a requirement to create Site Collection with Office 365 group, so I have used following method CreateUnifiedGroup of OfficeDevPnP.Core.Framework.Graph namespace.
Here is the sample code that I have used:

var title = "Dev POC Test ";
var description = "Some description of site goes here";
var group = UnifiedGroupsUtility.CreateUnifiedGroup(title, description,
                                                Regex.Replace(title, @"(^0-9a-zA-Z:,)+", ""), accessToken,
                                                groupLogo: null, isPrivate: true, createTeam: true, retryCount: 10, delay: 500);

Console.WriteLine(group.SiteUrl);

Well, previously above code was working fine but now it is giving rare error message at function calling CreateUnifiedGroup like below:

System.ApplicationException: Exception while invoking endpoint https://graph.microsoft.com/v1.0/groups/9d099dfd-1028-4f55-9dfb-fc4863aabeaf/team. ---> System.Web.HttpException: {
  "error": {
    "code": "NotFound",
    "message": "Failed to execute MS Graph backend request GetGroupInternalApiRequest. The server failed to respond correctly. Response Code: NotFound, Reason: Reason: Not Found, Correlation headers: request-id: 559dd0c2-2a91-40bd-8630-0cdb180772adrnclient-request-id: 559dd0c2-2a91-40bd-8630-0cdb180772adrnx-ms-ags-diagnostic: {"ServerInfo":{"DataCenter":"South Central US","Slice":"SliceC","Ring":"3","ScaleUnit":"000","RoleInstance":"AGSFE_IN_14"}}rnDate: Tue, 13 Oct 2020 01:48:53 GMTrn",
    "innerError": {
      "date": "2020-10-13T01:48:54",
      "request-id": "c4da2078-d915-47c2-930b-a48da78e4bdf",
      "client-request-id": "c4da2078-d915-47c2-930b-a48da78e4bdf"
    }
  }
}
   --- End of inner exception stack trace ---
   at OfficeDevPnP.Core.Framework.Graph.GraphHttpClient.MakeHttpRequest(TResult)(String httpMethod, String requestUrl, String accept, Object content, String contentType, String accessToken, Func`2 resultPredicate)
   at OfficeDevPnP.Core.Framework.Graph.UnifiedGroupsUtility.<>c__DisplayClass18_0.<CreateTeam>b__0()
   at System.Threading.Tasks.Task.Execute()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at OfficeDevPnP.Core.Framework.Graph.UnifiedGroupsUtility.<CreateTeam>d__18.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at OfficeDevPnP.Core.Framework.Graph.UnifiedGroupsUtility.<>c__DisplayClass4_0.<<CreateUnifiedGroup>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at OfficeDevPnP.Core.Framework.Graph.UnifiedGroupsUtility.CreateUnifiedGroup(String displayName, String description, String mailNickname, String accessToken, String() owners, String() members, Stream groupLogo, Boolean isPrivate, Boolean createTeam, Int32 retryCount, Int32 delay)

I understand this has something to do with Microsoft’s server, but has anyone encountered such error before? Can we do something to resolve this issue?

Any help would be much appreciated!