Breadcrumb NAV XT causing strange errors in Google webmaster tools

Thus far, I have not seen anything that conclusively states that the breadcrumb trail generated by Breadcrumb NavXT does not obey the RDFa microformat. The new Google Webmaster Tools Structured Data tool seems to have some bugs still/does not follow Google’s own specifications/guidelines. It’s been discussed previously in this thread: https://ww.wp.xz.cn/support/topic/google-testing-tool-error-url-missing-and-required?replies=11

I will revisit this before the next release, but I’m not sure if there is much I can do.