RT 4.4.0rc1 issues

To test the 4.4 upgrade, I removed all of my local customizations and tried setting the homepage back to a very basic setup. Whenever I use ‘My Tickets’ on the homepage, the page stops loading and displays:
An internal RT error has occurred. Your administrator can find more details in RT's log files.

In the logs, I see:

[39520] [Thu Nov  5 19:40:23 2015] [error]: Can't call method "loc" on an undefined value at /usr/local/rt4/sbin/../lib/RT/Ticket.pm line 1374.


Stack:

  [/usr/local/rt4/sbin/../lib/RT/Ticket.pm:1374]

  [/usr/local/rt4/sbin/../lib/RT/Ticket.pm:1386]

  [/usr/local/rt4/share/html/Elements/RT__Ticket/ColumnMap:185]

  [/usr/local/rt4/share/html/Elements/CollectionAsTable/Row:130]

  [/usr/local/rt4/share/html/Elements/CollectionList:152]

  [/usr/local/rt4/share/html/Elements/ShowSearch:54]

  [/usr/local/rt4/share/html/Widgets/TitleBox:56]

  [/usr/local/rt4/share/html/Elements/ShowSearch:55]

  [/usr/local/rt4/share/html/Elements/MyRT:99]

  [/usr/local/rt4/share/html/index.html:78]

  [/usr/local/rt4/sbin/../lib/RT/Interface/Web.pm:696]

  [/usr/local/rt4/sbin/../lib/RT/Interface/Web.pm:375]

  [/usr/local/rt4/share/html/autohandler:53] (/usr/local/rt4/sbin/../lib/RT/Interface/Web/Handler.pm:208)


Anyone else seeing this sort of behavior?