Everyone can expain this debug log mean, where I get wrong?

[HB5301H36]

[20:22:47:792] System.NullReferenceException: Object reference not set to an instance of an object.
at Styx.WoWInternals.Lua.GetReturnVal[T](String lua, UInt32 retVal)

I use HB to bot, everytime it shows me a log like this.

Where was I wrong, How can I fix it?
Here is the log

 

[Kickazz006]

log.txt - attach it

 

[HB5301H36]

log.txt - attach it

I post it on the #1

 

[snoweey]

have you tried a diffrent CC