Hi,
After we have installed rollup 1 in our CRM 2013 environment we started to receive strange error in some entities. When you open a form of a record and click button Run Workflow, you receive error "LookupObjectsWithCallback is undefined".
I have done some research and found that error is displayed when the form does not have any lookup field.
Workaround:
Just put any lookup field in the form - it can be Created By or any other field in header, body or footer of the form.