Error on line 152 in file /plugins/Contents.php

Point of failure:
Plugin_Contents::set_labels()

Message:
Labels for content type 'promotions' were not found

Trace:
0. VC_Routing::process
1. Admin->__construct
2. VC_Controller->__construct
3. VC_Events->fire
4. VC_EventsCallback->execute
5. Plugin_Contents->set_labels
6. Plugin_Contents::set_labels