When going to an employee's profile, you may get a 'Failed to load' error when clicking the Position menu.
This can be caused by the employee having several posts under Position History with the same start date, which cannot be true.
Each employment must have one one active post at a time.
To resolve this:
Go to the employee's profile and click the Admin tab.
Select Admin, then Edit an existing post/position.
Click each line and make sure the dates in the StartDate and EndDate fields are correct.
Click Save.