在以调试模式启动项目时，Orchard.Projections项目中为空引用

Question

以调试模式启动项目时，我在输出窗口中发现了这个问题。

  

引发的异常：Orchard.Projections.dll中的“ System.NullReferenceException”   Orchard.ContentManagement.Drivers.Coordinators.ContentPartDriverCoordinator：错误-Orchard.Projections.Drivers.ProjectionPartDriver从IContentPartDriver抛出NullReferenceException   System.NullReferenceException：对象引用未设置为对象的实例。      在Orchard.Projections.Drivers.ProjectionPartDriver。<> c__DisplayClass18_0.b__1（对象形状）      在Orchard.ContentManagement.Drivers.ContentPartDriver 1.<>c__DisplayClass25_0.<ContentShape>b__0(BuildShapeContext ctx) in F:\Ashish\test\Orchard-1.10.2_New\Orchard-1.10.2\src\Orchard\ContentManagement\Drivers\ContentPartDriver.cs:line 187 at Orchard.ContentManagement.Drivers.ContentPartDriver 1中。<> c__DisplayClass26_0.b__0（BuildShapeContext ctx）在F：\ Ashish \ test \ Orchard-1.10.2_New \ Orchard-1.10.2 \ src \ Orchard \ ContentManagement \ Drivers \ ContentPartDriver.cs：第192行      在F：\ Ashish \ test \ Orchard-1.10.2_New \ Orchard-1.10.2 \ src \ Orchard \ ContentManagement \ Drivers \ ContentShapeResult.cs：line中的Orchard.ContentManagement.Drivers.ContentShapeResult.ApplyImplementation（BuildShapeContext上下文，字符串displayType）处48      在Orchard.ContentManagement.Drivers.ContentShapeResult.Apply（BuildDisplayContext上下文）中的F：\ Ashish \ test \ Orchard-1.10.2_New \ Orchard-1.10.2 \ src \ Orchard \ ContentManagement \ Drivers \ ContentShapeResult.cs：line 24      在Orchard.ContentManagement.Drivers.CombinedResult.Apply（BuildDisplayContext上下文）中的F：\ Ashish \ test \ Orchard-1.10.2_New \ Orchard-1.10.2 \ src \ Orchard \ ContentManagement \ Drivers \ CombinedResult.cs：line 28      在Orchard.ContentManagement.Drivers.Coordinators.ContentPartDriverCoordinator处。 ContentPartDriverCoordinator.cs：第49行      在Orchard.InvokeExtensions.Invoke [TEvents]（IEnumerable 1 events, Action 1分派，ILogger记录器）中的F：\ Ashish \ test \ Orchard-1.10.2_New \ Orchard-1.10.2 \ src \ Orchard \ InvokeExtensions.cs：第17行