Strange Lua Error

[Letho]

Hello fellow coders,
I'm currently running into an issue that i am not able to resolve. I'm getting this error from time to time, sometimes just on login, sometimes when clicking on sth.



I'm not really experienced at coding lua, but as far as i know the error message should at least provide some information on the addon or file that produces it. The long numeric value doesnt look like a memory adress to me and it could be referring to a 'line 3', but where exactly? and whats does "function '(main chunk)'" represent?

Thx in advance and cheers,
Letho