Before killing 'wraith of crow', the shadow must take the skeleton key but in my case, it doesn't take the key and doesn't give me the next objective 'Defeat the wraith of crow'
However after killing the crow, then it gives me the 'Defeat the wraith of crow' objective. As a result, crow is already dead but the quest is still asking me to kill the crow which I cannot.

I've been reporting this bug for months, still no fix. I haven't been able to complete this quest over a month and a week.
Please fix this!