**Originated From:** [https://products.aspose.app/slides/viewer/navigation/errorReportForm](https://products.aspose.app/slides/viewer/navigation/errorReportForm)
**Exception:** Invalid file, please ensure that uploading correct file
{"id":"d9a5baab-9ded-451c-a7ed-7d16cda07506","FileName":"sun pharma statement (1).RPT","idUpload":"d9a5baab-9ded-451c-a7ed-7d16cda07506","IsSuccess":false,"idError":"InvalidFile","Message":"Invalid file"} undefined
Error on zipping file System.NullReferenceException: Object reference not set to an instance of an object. at Aspose.Slides.Web.Core.Services.Storage.TemporaryFolder.SaveAsync(Stream stream, String fileName, CancellationToken token) in C:\JenkinsNode\workspace\Slides\Aspose.Slides.WebApps Premerge (.NET 5)\src\Aspose.Slides.Web.Core\Services\Storage\TemporaryFolder.cs:line 38 at Aspose.Slides.Web.Core.Services.Error2ForumService.<>c__DisplayClass6_0.<b__0>d.MoveNext() in C:\JenkinsNode\workspace\Slides\Aspose.Slides.WebApps Premerge (.NET 5)\src\Aspose.Slides.Web.Core\Services\Error2ForumService.cs:line 120 --- End of stack trace from previous location --- at Aspose.Slides.Web.Core.Services.Error2ForumService.PostAppToForums(Error2ForumRequest model, CancellationToken cancellationToken) in C:\JenkinsNode\workspace\Slides\Aspose.Slides.WebApps Premerge (.NET 5)\src\Aspose.Slides.Web.Core\Services\Error2ForumService.cs:line 115
We cannot reproduce this issue at our end using sample Slide. Could you please share the problematic file or try the web app again?