The first thing you need to do to solve the Unspecified Type Structured Data validation warning is to make sure that you are not using the base URL in your HTML head. Check <head > section if you have <base href="yoursite" />. If it is there, then remove it.
The Unspecified Type warning should disappear.
Info: Open Graph protocol (ogp.me) tags do not accept <base>. You should use the full URL or rel= canonical.