Global - Application Error Handler

Offending URL: https://services.hammersmithtoday.co.uk/css.axd?d=combine&f=/resource/style
Source: HandlersAndModules
Message: Object reference not set to an instance of an object.
Stack trace: at Miron.Web.MbCompression.CompressionHandlerBase.ProcessRequest(HttpContext context) in C:\VSTS\NNet.Old.Master\HandlersAndModules\Handlers\CompressionHandlerBase.cs:line 35 at Miron.Web.MbCompression.CssCompressionHandler.ProcessRequest(HttpContext context) in C:\VSTS\NNet.Old.Master\HandlersAndModules\Handlers\CssCompressionHandler.cs:line 49 at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)