Wac server Get-OfficeWebAppsFarm : The content type text/html; charset=utf-8 of the response message

[AWS]

The Wac server responding with a bad answer 500.21 if you try Get-officeWebAppsFarm

Get-OfficeWebAppsFarm : The content type text/html charset=utf-8 of the response message does not match the content
type of the binding (application/soap+msbin1). If using a custom encoder, be sure that the IsContentTypeSupported
method is implemented properly. The first 1024 bytes of the response were: '


IIS 7.5 Detailed Error - 500.21 - Internal Server Error