xsd/xml in visual studio 2017

Thirdparty have told us to use xsd (location: [login to view URL]) to validate our xml that we are pushing to them. Example xml they provided (location: [login to view URL]), keeps giving me errors, when i use it in Visual Studio 2017 with debugging (under xml/ALT + F5). We got a form, with x number of items, which now seems it may not been enough information we are passing, so we need to get this xml to pass validation, so it can be accepted into their system. I'll provide more details if you need, but above urls should provide plenty of information for the right person to troubleshoot and help us out.