I am facing this issue with Sugar CRM community edition Version 6.5.26 that when I'm going to the Target Lists module from the Drop down menu the Search and Clear Buttons are not working.
on checking in browser console , I'm seeing the error that form is null inside the "clear_form" method.
The same buttons are working when I go to the Target List page from the "View Target Lists" link.
The URLs are different in both the situations.
On click Target Lists option from drop down list: <SugarCRM>/index.php?action=ajaxui#ajaxUILoc=index.php%3Fmodule%3DProspectLists%26action%3Dindex
On click View Target List link: