Unable to change appearance of Vistani Orb to Sinister Tome

logancaine

The game does not allow to use the "Sinister Tome" to modify the apperance of the "Vistani Orb". I already modified an artifact weapon with the "Tome of Control" before (I used its refinement points to upgrade the "Vistani Orb" later on)... So I am sure that artifact weapons can indeed change appearance to a non-artifact weapon.
There is no reason why it shouldn't be possible to change the appearance of the Vistani Orb to the Sinister Tome.

Please fix.