Minecraft 1.12.2
Forge: 14.23.5.2838
Mod Version: branders-enhanced-mob-spawners.v1.4.1-1.12.2
Detonating a TNT or a Explosive mob (creeper) near mob spawner = instant crash
https://pastebin.com/KpgHMjGZ
https://pastebin.com/cvbVtN5D

Thanks for the issue, it has now been fixed.
See https://www.curseforge.com/minecraft/mc-mods/enhanced-mob-spawners/files/2917294 for latest download.