Many errors with the new patch :(

5x tullaRange/actionState.lua:48: attempt to call global 'IsUsableSpell' (a nil value)
[string "@tullaRange/actionState.lua"]:48: in function GetPetActionState' [string "@tullaRange/updater.modern.lua"]:158: in function <tullaRange/updater.modern.lua:157> [string "@tullaRange/updater.modern.lua"]:257: in function <tullaRange/updater.modern.lua:248> [string "=[C]"]: ? [string "=[C]"]: in function Update'
[string "@Blizzard_ActionBar/Mainline/PetActionBar.lua"]:86: in function <Blizzard_ActionBar/Mainline/PetActionBar.lua:70>
[string "=[C]"]: ?

Locals:
slot = 4
_ = "Dash"
_ = 132120
_ = nil
_ = false
_ = true
_ = true
spellID = 61684
checksRange = false
inRange = false
oor = false
(*temporary) = nil
(*temporary) = 61684
(*temporary) = "attempt to call global 'IsUsableSpell' (a nil value)"

Same

11x tullaRange/actionState.lua:48: attempt to call global 'IsUsableSpell' (a nil value)
[string "@tullaRange/actionState.lua"]:48: in function GetPetActionState' [string "@tullaRange/updater.modern.lua"]:158: in function <tullaRange/updater.modern.lua:157> [string "@tullaRange/updater.modern.lua"]:257: in function <tullaRange/updater.modern.lua:248> [string "=[C]"]: ? [string "=[C]"]: in function Update'
[string "@Blizzard_ActionBar/Mainline/PetActionBar.lua"]:74: in function <Blizzard_ActionBar/Mainline/PetActionBar.lua:70>
[string "=[C]"]: ?

Locals:
slot = 4
_ = "Bite"
_ = 132127
_ = nil
_ = false
_ = true
_ = true
spellID = 17253
checksRange = false
inRange = false
oor = false
(*temporary) = nil
(*temporary) = 17253
(*temporary) = "attempt to call global 'IsUsableSpell' (a nil value)"

looks like it's fixed with the newest update :) thank you tuller

still causing problems on Cataclysm Classic.

fixed by changing this
local _, oom = (IsSpellUsable or C_Spell.IsSpellUsable)(spellID)
to this
local _, oom = (IsUsableSpell or C_Spell.IsSpellUsable)(spellID)

not sure if the C_Spell.IsSpellUsable portion is correct. I believe that's just for retail which I haven't got installed