SQL Server 2014 Instance Uninstall Fails

I tried to uninstall a SQL Server 2014 Instance but it failed during the uninstall.  Is it possible to fix the error or will I have to do a manual sql server instance uninstall.  Thanks

During the middle of uninstall, I received this error:

Exception has been thrown by the target of an invocation.

Setup log excerpts:

Exception summary:
The following is an exception stack listing the exceptions in outermost to innermost order
Inner exceptions are being indented

Exception type: Microsoft.SqlServer.Chainer.Infrastructure.CancelException
    Message:
        User has cancelled.
    HResult : 0x84b70642
        FacilityCode : 1207 (4b7)
        ErrorCode : 1602 (0642)
    Stack:
        at Microsoft.SqlServer.Configuration.UIExtension.Request.Wait()
        at Microsoft.SqlServer.Configuration.UIExtension.UserInterfaceProxy.NavigateToWaypoint(String moniker)
        at Microsoft.SqlServer.Configuration.UIExtension.WaypointAction.ExecuteAction(String actionId)
        at Microsoft.SqlServer.Chainer.Infrastructure.Action.Execute(String actionId, TextWriter errorStream)
        at Microsoft.SqlServer.Setup.Chainer.Workflow.ActionInvocation.<>c__DisplayClasse.<ExecuteActionWithRetryHelper>b__b()
        at Microsoft.SqlServer.Setup.Chainer.Workflow.ActionInvocation.ExecuteActionHelper(ActionWorker workerDelegate)