Hi!
I have a same problem.
I want remove autofilter when I'm create a table in excel and I use "workSheet.AutoFilter.Clear();" like in your post (and documentation). But it's give me an error:
An exception of type 'System.NullReferenceException' occurred in ClosedXML.dll but was not handled in user code
Additional information: Object reference not set to an instance of an object.
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