[Cata Classic] Player Unit Frame all text disppears

[Jakobud]

Here is what my frames normally look like:

After some errors occur for some reason the text disappears:

Here are the two errors I see when this happens:

176x ...ePitBull4/Modules/Runes_Classic/Controls.lua:49: Usage: Script_GetRuneType(slot)
[string "=[C]"]: in function `GetRuneType'
[string "@PitBull4/Modules/Runes_Classic/Controls.lua"]:49: in function `UpdateTexture'
[string "@PitBull4/Modules/Runes_Classic/Runes.lua"]:146: in function `UpdateFrame'
[string "@PitBull4/ModuleHandling/Module.lua"]:314: in function `Update'
[string "@PitBull4/UnitFrame.lua"]:789: in function `Update'
[string "@PitBull4/UnitFrame.lua"]:815: in function `UpdateGUID'
[string "@PitBull4/Main.lua"]:1841: in function `?'
[string "@Scrap/libs/CallbackHandler-1.0-8/CallbackHandler-1.0.lua"]:119: in function <...rap/libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:119>
[string "=[C]"]: ?
[string "@Scrap/libs/CallbackHandler-1.0-8/CallbackHandler-1.0.lua"]:29: in function <...rap/libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:25>
[string "@Scrap/libs/CallbackHandler-1.0-8/CallbackHandler-1.0.lua"]:64: in function `Fire'
[string "@Scrap/libs/AceEvent-3.0-4/AceEvent-3.0.lua"]:120: in function <...faceScrap/libs/AceEvent-3.0/AceEvent-3.0.lua:119>

Locals:
(*temporary) = nil

621x ...ePitBull4/Modules/Runes_Classic/Controls.lua:63: Usage: GetRuneCooldown(slot)
[string "=[C]"]: in function `GetRuneCooldown'
[string "@PitBull4/Modules/Runes_Classic/Controls.lua"]:63: in function `UpdateCooldown'
[string "@PitBull4/Modules/Runes_Classic/Runes.lua"]:58: in function `?'
[string "@Scrap/libs/CallbackHandler-1.0-8/CallbackHandler-1.0.lua"]:119: in function <...rap/libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:119>
[string "=[C]"]: ?
[string "@Scrap/libs/CallbackHandler-1.0-8/CallbackHandler-1.0.lua"]:29: in function <...rap/libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:25>
[string "@Scrap/libs/CallbackHandler-1.0-8/CallbackHandler-1.0.lua"]:64: in function `Fire'
[string "@Scrap/libs/AceEvent-3.0-4/AceEvent-3.0.lua"]:120: in function <...faceScrap/libs/AceEvent-3.0/AceEvent-3.0.lua:119>

Locals:
(*temporary) = nil