Cannot save Analyze files report in .xlsx, only HTML, XML or MHT (Windows, Office 2016, SDL Studio 2017)

Hello, 

It's about a week I cannot save Analyze files Reports in xlsx format. Only the HTML, XML or MHT formats available. 

I have tried all the options offered in previously asked questions on this topic ( no Excel instances open, opening another project and then the interested one, uninstalling and reinstalling Studio) but nothing worked. 

I have also installed the XML reader plugin but I get the following error: "Index was outside the bounds of the array" (Please see details below).

Is there any workaround or solution I have missed and could try?

Thanks in advance, 

Kind regards, 

Stefania

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<SDLErrorDetails time="18/03/2021 16:43:46">
<ErrorMessage>Index was outside the bounds of the array.</ErrorMessage>
<Exception>
<Type>System.IndexOutOfRangeException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</Type>
<HelpLink />
<Source>Anonymously Hosted DynamicMethods Assembly</Source>
<HResult>-2146233080</HResult>
<StackTrace><![CDATA[ at CallSite.Target(Closure , CallSite , Object , Int32 )
at Sdl.Community.XmlReader.WPF.Helpers.Report.GenerateExcelReport(String folderPath, List`1 selectedItems)
at Sdl.Community.XmlReader.WPF.ViewModels.XmlFileViewModel.<>c__DisplayClass30_1.<GenerateExcel>b__1()
at System.Threading.Tasks.Task.InnerInvoke()
at System.Threading.Tasks.Task.Execute()
--- 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.GetResult()
at Sdl.Community.XmlReader.WPF.ViewModels.XmlFileViewModel.<GenerateExcel>d__30.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c.<ThrowAsync>b__6_0(Object state)
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