[Help] Crash error, any help would be much appreciated topic

Hello,
I am getting a crash error while using a mod, and am trying to figure out how to go about resolving it. Any help would be greatly appreciated.

Code:

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 Application has crashed: C++ exception
[string "lib/managers/group_ai_states/groupaistatebe..."]:1121: attempt to index local 'spawn_group_desc' (a nil value)
 
 SCRIPT STACK

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Thanks, Droidaka :)