https://hastebin.com/amirayivec.rb

Likely a crash related to the implementation of the new "Clear All" function on the Magician's Table. Replicated by placing Beam -->> Lightning -->> On Entity Collision. Yes this shows up as an invalid spell but when you try and click the "Clear" button or if you press almost any key while in that window the entire game crashes to desktop.

Get a second crash also when trying to save a valid spell: (Beam, Entity Collision, Freeze)
https://hastebin.com/ujivinotas.rb

Excellent, looks like your revisions fixed the issues. I tried to replicate both crashes again unsuccessfully. Might this link be the one that was just approved on curse?

Yes, it is

Try this liblib jar please: https://cdn.discordapp.com/attachments/242885249351155713/575850273600307200/librarianlib-1.12.2-4.18-fat.jar