In the Presence of Royalty - Ergon Locus ??? bug

[Vold]

A target “Ergon Locus???” has been added to Yorcia Weald (I-8)
The key item Yorcia’s Tear may be obtained from this target with a 100% drop rate if the player is currently on the Adoulin Mission “In the Presence of Royalty” and does not possess one of the tears.

I just want to take the time, before I go harvesting up this Yorcia's Tear KI, that this SE approved hack does not work whatsoever on two of my characters.