Export-OdataEndpointProxy Fails Against SharePoint

[JamieSee]

Executing the following command against SharePoint 2013 or 2016 produces the error output below despite a fiddler trace clearly showing the metdata being delivered:

Export-ODataEndpointProxy -Uri 'https://SharePointSite/_api' -OutputModule '.\SharePointOData' -Credential $psCredential -Verbose -Force

VERBOSE: Performing the operation "Export-ODataEndpointProxy" on target "https://SharePointSite/_api". VERBOSE: The source code was already compiled and loaded. VERBOSE: Reading metadata from uri https://SharePointSite/_api/$metadata. VERBOSE: GET https://SharePointSite/_api/$metadata with 0-byte payload VERBOSE: received -byte response of content type application/xml VERBOSE: Parsing metadata... Export-ODataEndpointProxy : Failed to process metadata specified at URI 'https://SharePointSite/_api'. No output will be written. At line:1 char:1 + Export-ODataEndpointProxy -Uri https://SharePointSite/_api -Out ... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : InvalidData: (https://SharePointSite/_api:String) [Export-ODataEndpointProxy], InvalidOperationException + FullyQualifiedErrorId : ODataEndpointProxyInvalidInput,Export-ODataEndpointProxy

Fiddler Summary:

Number	Result	Protocol	Host	URL	Body	Caching	Content-Type	Process	Comments	Custom
763	200	HTTPS	SharePointSite	/_api/$metadata	731,691	private, max-age=0; Expires: Thu, 21 Mar 2019 20:24:21 GMT	application/xml;charset=utf-8	pwsh:3740