Warning message popping up during page edit

I just updated the Domain Mapping plugin and now I see this warning when I edit pages using a visual editor

"Warning: Missing argument 2 for Domainmap_Module_Mapping::post_preview_link_from_original_domain_to_mapped_domain() in /home/wedhrfow/public_html/wp-content/plugins/domain-mapping/classes/Domainmap/Module/Mapping.php on line 714"

How can I get this warning removed? Users do not see it on the published site but it is visible when I use a visual editor.