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Issue - invalid file, please ensure that uploading correct 2021-09-20t13:35:21.877z


**Originated From:** [https://products.aspose.app/slides/merger](https://products.aspose.app/slides/merger)
**Exception:** Invalid file, please ensure that uploading correct file
{"isSuccess":false,"idError":"InvalidFile","message":""} 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:\src\Aspose.Slides.Web.Core\Services\Storage\TemporaryFolder.cs:line 38 at Aspose.Slides.Web.Core.Services.Error2ForumService.<>c__DisplayClass4_0.<b__0>d.MoveNext() in C:\src\Aspose.Slides.Web.Core.Services.Error2Forum\Error2ForumService.cs:line 93 --- End of stack trace from previous location --- at Aspose.Slides.Web.Core.Services.Error2ForumService.<>c__DisplayClass4_0.<b__0>d.MoveNext() in C:\src\Aspose.Slides.Web.Core.Services.Error2Forum\Error2ForumService.cs:line 93 --- End of stack trace from previous location --- at Aspose.Slides.Web.Core.Services.Error2ForumService.PostAppToForums(Error2ForumRequest model, CancellationToken cancellationToken) in C:\src\Aspose.Slides.Web.Core.Services.Error2Forum\Error2ForumService.cs:line 88

hey Aspose your system seems to be down. I tried numerous files which worked a few days ago and now all of them error or they succeed but then the file to download is not valid so it errors.