ToME: the Tales of Maj'Eyal

Attempting to shoot a bow with arrows equipped does nothing at the moment (at least in the tutorial mode, I haven't tested otherwise). Error messages are below:

[LOG] Lorthos shoots!
USING table: 0x152b7e0 Shoot
[ARCHERY ACQUIRE TARGETS WITH] ash longbow elm arrow
stack traceback:
/mod/class/interface/Archery.lua:80: in function 'damtype'
/engine/interface/ActorProject.lua:122: in function 'project'
/mod/class/interface/Archery.lua:67: in function 'archeryAcquireTargets'
/data/talents/techniques/archery.lua:33: in function 'action'
/engine/interface/ActorTalents.lua:117: in function </engine/interface/ActorTalents.lua:111>
Lua Error: /engine/interface/GameTargeting.lua:103: /mod/class/interface/Archery.lua:80: attempt to call method 'doesPackRat' (a nil value)
At [C]:-1
At [C]:-1 error
At /engine/interface/GameTargeting.lua:103 fct
At /engine/interface/GameTargeting.lua:109 targetMode
At /engine/interface/GameTargeting.lua:160 ?
At /engine/KeyBind.lua:198

Whoops