从DNN 7升级后，我的搜索结果模块出现问题-> DNN 9.2.2
[每次我使用DNN的Xcillion（内置搜索）进行搜索时，我总是收到“发生了严重错误。请检查事件查看器以获取更多详细信息。”搜索结果页面上的（/Default.aspx?tabid=87&error=Object+reference+not+set+to+an+instance+of+an+object.&content=0）错误。
我已经尝试通过删除搜索文件夹（即https://dnnsupport.dnnsoftware.com/hc/en-us/articles/360004881174-Search-Not-Showing-Expected-Results）中的内容来重新编制索引>
已从/ desktopmodules / admin / searchresults备份了旧文件，并添加了新文件，以防万一在安装过程中出现问题，与DLL文件相同，这可能会导致搜索无效。
任何提示或想法都会很棒，其他所有在此DNN实例上正常运行的东西都无法弄清楚该错误。
管理员日志错误1：
Message:Object reference not set to an instance of an object. StackTrace: InnerMessage:Object reference not set to an instance of an object. InnerStackTrace: at DotNetNuke.Modules.SearchResults.SearchResults.get_SearchContentSources() at DotNetNuke.Modules.SearchResults.SearchResults.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)管理员日志错误2：
Message:Value cannot be null. Parameter name: type StackTrace: at System.Activator.CreateInstance(Type type, Boolean nonPublic) at System.Activator.CreateInstance(Type type) at DotNetNuke.Services.Search.Internals.InternalSearchControllerImpl.SearchContentSourceCallback(CacheItemArgs cacheItem) at DotNetNuke.Common.Utilities.DataCache.GetCachedDataFromRuntimeCache(CacheItemArgs cacheItemArgs, CacheItemExpiredCallback cacheItemExpired)管理员日志错误3：
Message:Value cannot be null. Parameter name: collection
StackTrace:
at System.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument) at System.Collections.Generic.List`1.InsertRange(Int32 index, IEnumerable`1 collection) at DotNetNuke.Web.InternalServices.SearchServiceController.GetSearchContentSources(IList`1 typesList) at DotNetNuke.Web.InternalServices.SearchServiceController.Preview(String keywords, String culture, Int32 forceWild, Int32 portal) at lambda_method(Closure , Object , Object[] ) at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.b__9(Object instance, Object[] methodParameters) at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken) --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Web.Http.Tracing.ITraceWriterExtensions.d__18`1.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Web.Http.Controllers.ApiControllerActionInvoker.d__0.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Web.Http.Tracing.ITraceWriterExtensions.d__18`1.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Web.Http.Controllers.ActionFilterResult.d__2.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Web.Http.Filters.AuthorizationFilterAttribute.d__2.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Web.Http.Filters.AuthorizationFilterAttribute.d__2.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Web.Http.Controllers.ExceptionFilterResult.d__0.MoveNext()```
从DNN 7升级后，我的搜索结果模块出现问题-> DNN 9.2.2每当我使用DNN的Xcillion（内置搜索）进行搜索时，我总是收到“发生了严重错误。请...
您是否遵循建议的升级路径，还是只执行了一步？
您是否可以选择还原并再次尝试升级？