Editing enterprise custom field lookup table, Error='gzip' is not a supported encoding name.

Editing an enterprise custom field lookup table, I received an unexpected error with no other information in the PWA page.  The following error appeared in the ULS log. Application error when access/_vti_bin/PSI/LookupTable.asmx, Error=’gzip’ is not a supported encodingname.  Parameter name: name   at System.Globalization.EncodingTable.internalGetCodePageFromName(Stringname)     at System.Globalization.EncodingTable.GetCodePageFromName(Stringname)     at System.Text.Encoding.GetEncoding(Stringname)     at Microsoft.Office.Project.Server.PSIForwarderHandler.ProcessRequest(HttpContextcontext)     at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()     at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&completedSynchronously)…

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