If you are faced with a bug – you cannot complete the Trial of the Cabalist quest, due to the fact, that you have, most likely, spent more than one Absorber quest item in the same place and now you do not have enough of them (you need 6). Which means you are left with only 2 options for solving this problem:
- Cancel your quest and try to complete it from the beginning.
- If the 1st option did not help, then you should contact support, in order to help you, right here.
You can find out about this problem in this video: