I built an automation for soul sand creation via barrels (Ex Nihilo: Sequentia). An auto clicker should right click with sand on a barrel filled with witchwater. In the moment I started the auto clicker, the game crashed and after this everytime I want to enter the savegame the game crashes.

first-server-crash.txt
later-crash-at-start-client.txt
later-crash-at-start-server.txt

Mod Pack: Skyopolis 3 (1.6.0)

• ClickMachine-1.16.3-4.2.2.jar
• exnihilosequentia-1.16-1.2.1.2.jar (Bug also reported there; NovaMachina-Mods/ExNihiloSequentia#63)
• multiple other mods

Should be fixed in Ex Nihilo: Sequentia. :)