yoast sitemap xml :This is not a valid URL.

So google bot hates my sitemap.. its all there but the URLS are “not valid” perhaps because they are relative ? perhaps its the HTTPS ? I’m not sure. I have scored the forum and followed the help files.. turned the xml on and off again/ saved the permalinks … no joy.
Im using a relative links plugin on site as well so perhaps its a conflict or.. maybe its just wrong.. is there a way to force the plugin to write out the links whith the full url (assuming that is the core issue ) I have a custom functions file in my child template and i’m not afraid of php…