Works in dev but not in Prod

   Really puzzled, never seen something like this and error message is not helping.

Code:

try

                {

                    this.IsBusy = true;

                    var queryCarrier = from c in entityManager.DSPCarriers

                                       join con in entityManager.LOCContacts on c.PrimaryContactKey equals

                                           con.ContactKey

                                       where c.CarrierKey.Equals(this.CurrentItem.CarrierKey.Value)

                                       select new { con.FirstName, con.LastName };

                    var carrierResults = await queryCarrier.ExecuteAsync();

                    var cr = carrierResults.FirstOrDefault();

                    if (cr != null)

                    {

                        firstName = cr.FirstName;

                        lastName = cr.LastName;

                    }

                }

                catch (Exception ex)

                {

                    this.LoggerService.LogAsync(ex, "MaintainExpressCheckViewModel.Retrieve");

                }

                finally

                {

                    this.IsBusy = false;

                }

I assume it is related to how I run query, async\anonymous etc but such query being sent to server just fine on my dev machine.

When I install on server I get following exception(logged):

Error 0x2115.  Debugging resource strings are unavailable. See http://go.microsoft.com/fwlink/?linkid=106663&Version=5.1.30214.0&File=mscorrc.dll&Key=0x2115

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

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

   at aa.Module.bb.Views.MaintainExpressCheckViewModel.<Retrieve>d__4.MoveNext()

Why is this happening and is there any way to get more error details?