Player was hatching an multiple Egg_s_ inside the Nomadic Tent dimension. Had stepped away when presumably, the egg Hatched. Returned to GameCrash with following report- https://pastebin.com/ii33Jfzh

3 eggs were obtained from Creative menu, other 2 apparently hatched just fine.

Wyrmroost-1.14.4-1,0,2
citadel-1.0.0
forge-28.1.87
NomadicTents-1.14.4-10.0.2-beta

Problem has been resolved in development builds. Thank you for the report.