GetAttachment operation, like in the example is not working

Hi, My original question was in another place (https://github.com/OfficeDev/office-js/issues/3937). But actually the problem is that the soap of the EWS request does not work. Here is the example: https://video2.skills-academy.com/en-us/exchange/client-developer/web-service-reference/getattachment-operation?redirectedfrom=MSDN