Module could not be found (VSTS Build with Windows 10 SDK for Creators update )

We are creating appxbundle on VSTS for UWP apps. The builds are successful, however at runtime we are getting exception while accessing the following method:

public static Task<DeviceManagementClient> CreateAsync(IDeviceTwin deviceTwin, IDeviceManagementRequestHandler hostAppHandler);

Exception:

    The specified module could not be found. 
    (Exception from HRESULT: 0x8007007E) at System.StubHelpers.StubHelpers.GetWinRTFactoryObject(IntPtr pCPCMD) 
at SystemConfiguratorProxyClient.SCProxyClient..ctor() at Microsoft.Devices.Management.SystemConfiguratorProxy..ctor() 
at Microsoft.Devices.Management.DeviceManagementClient.<CreateAsync>d__7.MoveNext() --- 

Build Machine: Windows Server 2012 R2 with Windows 10 SDK Fall creators update

Runtime: Dragonboard with Windows 10 RS3 build

We followed the UWP build template for creating the app packages.

What are we missing?

The problem was we had a custom Nuget package which was built in Debug version, hence it was not working in release build configuration. Thanks!