Trying to get tid notice, not loading the taxonomy item

When I click on a term I get:

An AJAX HTTP error occurred.
HTTP Result Code: 200
Debugging information follows.
Path: /system/ajax
StatusText: OK
ResponseText:
Notice: Trying to get property 'tid' of non-object in /home/customer/www/innovatebio.org/public_html/sites/all/modules/taxonomy_manager/taxonomy_manager.module on line 631

Also see the notice in the pages error header.