Runtime Error: 1683750352\Scripts\GiftItToMeNow.lua:627: attempt to index a nil value
stack traceback:
1683750352\Scripts\GiftItToMeNow.lua:627: in function 'OnUnitFormCorps'
1683750352\Scripts\GiftItToMeNow.lua:636: in function 'OnUnitFormArmy'
[C]: in function 'func'
[C]: in function '(anonymous)'

Folder:
1683750352\Scripts\

File:
GiftItToMeNow.lua

Function:
OnUnitFormCorps

Line:
627

Code:
local unitType = GameInfo.Units[unit:GetType()].UnitType;

Full Context:
-- Hook into corp-formation
function OnUnitFormCorps(playerId, unitId)
-- Logging
WriteToLog("OnUnitFormCorps")
WriteToLog(playerId)
WriteToLog(unitId)

-- Fetch player data
local player = Players[playerId];
local unit = player:GetUnits():FindID(unitId);
local unitType = GameInfo.Units[unit:GetType()].UnitType;

-- Memorize freed resource
XP2FreeResourceConsumption(playerId, unitType);
end

The code should do some error checking for nil condition before indexing and handle it
Since I'm not familiar with the context of the consequences of a nil condition,
I don't know what to suggest exactly.
Also, I am a dinosaur and don't know serious modern coding skills.

if unit:GetType() ~= nil then
local unitType = GameInfo.Units[unit:GetType()].UnitType;
end