I'm trying to insert an OLE object (.xlsx) file into presentation slide. However, getting Object Reference not set to an instance error. Please find below stack trace.
at Syncfusion.OfficeChart.Compression.Zip.ZipArchive.Save(Stream outStream, Boolean createFilePath)
at Syncfusion.Presentation.Presentation.SaveAsStream(Stream fileStream)
at Syncfusion.Presentation.Presentation.<>c__DisplayClass160_0.<SaveAsyncInternal>b__0()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Syncfusion.Presentation.Presentation.<SaveAsyncInternal>d__160.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Syncfusion.Presentation.Presentation.<SaveAsync>d__159.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at DSA.Windows.Services.ConversionService.<downloadAsPPTX>d__17.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at DSA.Windows.Services.ConversionService.<SaveImagesForDownload>d__16.MoveNext()
