I just upgraded fr om DTRegister 2.5.9 to 2.6.7e, and upgraded EventLink from 2.3.4 to 2.6.4 and I'm getting messages like the following at the tops of many of my pages:
Notice: Undefined variable: private_event_notification in /home/content/c/i/t/cityloccom/html/components/com_dtregister/config.dtregister.php on line 66
Yes I have an idea... you didn't follow the upgrade instructions fully You need to re-save the main Configuration of DT Register. There are tons of new parameters and you don't have them saved into your database... so you're getting those errors. Go through your config and make sure everything is setup and saved. Then you'll be fine.