I'm trying to upgrade our site from 4.4.21 to 4.6.27 (latest LTS). The upgrade process, following the guide, worked as expected and everything looked ok initially. However, when I try to create a new Event, several custom fields don't work and don't look right.
The contact reference autocomplete-select fields don't auto-complete (nor do they load the little icon next to the field, the js isn't loading). And the date fields look really off, with two fields and the calendar icon doesn't pop up a calendar.
This is only on custom fields for events. Standard date fields are fine, it seems.
The only error I could find was in the Console, with this message right as it's loading the custom fields. I don't see any errors in the apache logs nor on screen (I have debugging turned on). So I'm at a bit of a loss on how to debug this.
Error: cannot call methods on autocomplete prior to initialization; attempted to call method '/civicrm/ajax/contactref?context=customfield&id=129'
I thought it might be some custom module I have, but I've disabled everything and still get these odd custom fields. Would appreciate help in figuring this out.