Game Mechanics: Error message for Paladin disc

[Tura]

[Tue Mar 08 23:19:43 2016] Unknown spell effect 219 in spell Holyforge Discipline (id 4500)
[Tue Mar 08 23:19:43 2016] Your weapon is bathed in a holy light.

I believe the disc mechanic itself is working (although critical hits barely ever occur, I have seen them once or twice), but I always get this error message when I use my disc.