Fix an error message in `ReadLayerGroup()` (#70666)
Fix an error message in `ReadLayerGroup()` (#70666)


tgstation/tgstation,Bawhoppen/-tg-station,tgstation/tgstation,tgstation/tgstation,Bawhoppen/-tg-station,Bawhoppen/-tg-station,tgstation/tgstation,Bawhoppen/-tg-station,tgstation/tgstation,Bawhoppen/-tg-station,Bawhoppen/-tg-station,tgstation/tgstation,tgstation/tgstation,Bawhoppen/-tg-station,tgstation/tgstation,Bawhoppen/-tg-station