Castbar Error

[Ssesmar]

10x Gladius/Modules/CastBar.lua:449: attempt to index field '?' (a nil value)
[string "@Gladius/Modules/CastBar.lua"]:449: in function ?' [string "@Gladius/Gladius.lua"]:68: in function Call'
[string "@Gladius/Gladius.lua"]:833: in function ResetUnit' [string "@Gladius/Gladius.lua"]:569: in function HideFrame'
[string "@Gladius/Gladius.lua"]:454: in function LeftArena' [string "@Gladius/Gladius.lua"]:405: in function ?'
[string "@Gladius/Gladius.lua"]:51: in function <Gladius/Gladius.lua:43>

Locals:
self =

{
defaults = {
}
messages = {
}
Enable = defined @Gladius/Gladius.lua:127
UnregisterAllEvents = defined @Gladius/Gladius.lua:123
CastEnd = defined @Gladius/Modules/CastBar.lua:242
UNIT_SPELLCAST_INTERRUPTIBLE = defined @Gladius/Modules/CastBar.lua:140
UpdateColors = defined @Gladius/Modules/CastBar.lua:293
enabled = true
UNIT_SPELLCAST_NOT_INTERRUPTIBLE = defined @Gladius/Modules/CastBar.lua:154
eventHandler = Frame {
}
GetOptions = defined @Gladius/Modules/CastBar.lua:505
attachTo = true
name = "CastBar"
IsEnabled = defined @Gladius/Gladius.lua:143
Disable = defined @Gladius/Gladius.lua:135
RegisterMessage = defined @Gladius/Gladius.lua:147
Update = defined @Gladius/Modules/CastBar.lua:325
UNIT_SPELLCAST_DELAYED = defined @Gladius/Modules/CastBar.lua:209
isBarOption = true
UNIT_SPELLCAST_STOP = defined @Gladius/Modules/CastBar.lua:202
GetAttachTo = defined @Gladius/Modules/CastBar.lua:87
OnDisable = defined @Gladius/Modules/CastBar.lua:80
isBar = true
CreateBar = defined @Gladius/Modules/CastBar.lua:253
GetFrame = defined @Gladius/Modules/CastBar.lua:95
RegisterEvent = defined @Gladius/Gladius.lua:112
IsDetached = defined @Gladius/Modules/CastBar.lua:91
Show = defined @Gladius/Modules/CastBar.lua:442
UNIT_SPELLCAST_START = defined @Gladius/Modules/CastBar.lua:107
UNIT_SPELLCAST_CHANNEL_START = defined @Gladius/Modules/CastBar.lua:168
OnEnable = defined @Gladius/Modules/CastBar.lua:54
GetIndicatorHeight = defined @Gladius/Modules/CastBar.lua:103
SendMessage = defined @Gladius/Gladius.lua:151
Test = defined @Gladius/Modules/CastBar.lua:462
frame = {
}
UnregisterEvent = defined @Gladius/Gladius.lua:119
Reset = defined @Gladius/Modules/CastBar.lua:447
}
unit = "arena5"
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index field '?' (a nil value)"