I'm experiencing an issue where i have my clicker setup as a mob killer which works perfectly fine, but after a server restart if i turn my spawner back on it will crash instantly. the only way to cure this is revert to a backup and then break and replace the clicker. I'm on 1.15.2, but should be evident in the provided files.
Crash report and server log included.
2020-09-29-9.log
crash-2020-09-29_15.29.22-server.txt

That crash is from ftb quests, not click machine

Ok since the crash is from FTB quests but is caused by the auto clicker killing a mob, I will need to speak to the ftb quests developer about fixing this issue?

Yes, its probably related to fake player handling