When trying to view an archived message, the following error is displayed.
![System.IO.InvalidDataException: The magic number in GZip header is not correct. Make sure you are passing in a GZip stream.](https://prod-support-images-cfm.s3.amazonaws.com/KB_1-3W0I5R1_magic_number.jpg)
In the Website.wlog, errors similar to the follow could be observed:
System.IO.InvalidDataException: The magic number in GZip header is not correct. Make sure you are passing in a GZip stream.
at System.IO.Compression.GZipDecoder.ReadHeader(InputBuffer input)
at System.IO.Compression.Inflater.Decode()
at System.IO.Compression.Inflater.Inflate(Byte[] bytes, Int32 offset, Int32 length)
at System.IO.Compression.DeflateStream.Read(Byte[] array, Int32 offset, Int32 count)
at System.IO.Compression.GZipStream.Read(Byte[] array, Int32 offset, Int32 count)
...
ERROR Configuration.ExceptionHandlerManager - {{a267add5-c105-46ad-9b6b-a355c81e1a20}} The Internal Error happened:
System.Web.HttpUnhandledException (0x80004005): Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.IO.InvalidDataException: The magic number in GZip header is not correct. Make sure you are passing in a GZip stream.
at System.IO.Compression.GZipDecoder.ReadHeader(InputBuffer input)
at System.IO.Compression.Inflater.Decode()
at System.IO.Compression.Inflater.Inflate(Byte[] bytes, Int32 offset, Int32 length)
at System.IO.Compression.DeflateStream.Read(Byte[] array, Int32 offset, Int32 count)
at System.IO.Compression.GZipStream.Read(Byte[] array, Int32 offset, Int32 count)
...