Error on shutdown

Was getting this error when as nutscript is shutting down:

NutScript is shutting down...

[ERROR] gamemodes/nutscript/gamemode/libs/sh_character.lua:547: attempt
to concatenate local 'steamID' (a nil value)
1. Save - gamemodes/nutscript/gamemode/libs/sh_character.lua:547
2. unknown - gamemodes/nutscript/gamemode/core/sv_hooks.lua:234