[Bug]: nameplate error

[reapercallin]

What happened?

I was questing in Outlands and came across a rare mob and got the kill and a achievement popped then the error came up, /reload clears it, but will come up again

Is there any errors?

2x [ADDON_ACTION_BLOCKED] AddOn 'ClassicCastbars' tried to call the protected function 'SetTargetClampingInsets()'.
[string "@!BugGrabber/BugGrabber.lua"]:485: in function <!BugGrabber/BugGrabber.lua:485>
[string "=[C]"]: in function `SetTargetClampingInsets'
[string "@Blizzard_NamePlates/Blizzard_NamePlates.lua"]:409: in function `SetupClassNameplateBars'
[string "@Blizzard_NamePlates/Blizzard_NamePlates.lua"]:143: in function `OnNamePlateAdded'
[string "@Blizzard_NamePlates/Blizzard_NamePlates.lua"]:78: in function <...eBlizzard_NamePlates/Blizzard_NamePlates.lua:69>

Game Version

Retail

Game Language

English

Does the issue still occur when all other addons are temporarily disabled?

None

Any additional info?

No response