Does J4Schema Affect Author Links

Hi,
The Joomla core 'Link Author' function does not seem to be doing what it should, it goes the right address but the page is blank. Having linked these two authors to J4Schema via Authors page in the plug in, is there a conflict?

This page, for example shows nothing: lgbt.co.uk/component/contact/contact/3

This comes from the Linked author function on this page lgbt.co.uk/government/346-margaret-thatcher-a-legacy

as an example.

Have you been aware of a conflict here?

Peter