The file in question is in
components/com_sobi2/sef_ext.php
Unfortunately author chose not to support SEF Advance despite the fact that SEF Advance invented and introduced the sef_ext.php files and API for 3rd party developers (which later was addopted by all other SEF components) and that we offer free licenses and support for 3rd party developers.
For now please delete the file to make the component work. We will provide SEF Advance compatible extension for this component, so you get human-friendly URLs, very soon so keep an eye on our homepage.
Thanks for this very fast answer...