The escort quests appear to be problematic. I've noticed further down in the forum someone has raised the same issue, whilst someone else responded with the fact that in their games this was working fine. Apparently once you accept the quest, you are supposedly partnered with a character representation of the subject whom is to be escorted. This functions as a character that can be killed and contributes to penalty in movement due to an inferior statistic. In my case, there is no indication of such a character & no matter how many times I land on the quest objective, there is no notification of resolution.