I have tried your HtmlPage6.html file with the latest version but always get exception while using it with the sample project. Please verify that correct file is shared and share the runnable project for testing. Also share the images showing the problem area for our reference.
Following exception is observed:
System.UriFormatException HResult=0x80131537 Message=Invalid URI: The hostname could not be parsed. Source=WebApplication7 StackTrace: at WebApplication7.Controllers.StreamProvider47584.Aspose.Cells.IStreamProvider.InitStream(StreamProviderOptions options) in C:\WebApplication7\Controllers\HomeController.cs:line 70 at ??.(String , Int32 , Int32 ) at ??. (Hashtable ) This exception was originally thrown at this call stack: [External Code] WebApplication7.Controllers.StreamProvider47584.Aspose.Cells.IStreamProvider.InitStream(Aspose.Cells.StreamProviderOptions) in HomeController.cs [External Code]