Can't progress the quest "Tango with a Tracker" because of game crash.

[Alhanelem]

99% of the time, this is because of third-party tools. Disable them to proceed with the cutscene and I won't tell anyone if you put them back afterward. Such things very commonly cause crashes or softlocks in cutscenes.

In regards to not being able to obtain the replacement KI, as per wiki:

The item can only be acquired once per week (Conquest Tally) and it does not matter if a character is still holding the item from the week before, it is still possible to receive another one during the week after the old one is used.

When conquest resets, you will be able to obtain a new KI.

All the behavior you described is expected and normal aside from the crash itself. It's not a bug.