I'm getting this error, and others like it, just after starting the server. ERROR]: Could not pass event BlockFertilizeEvent to TARDIS v4.6.3-b17.07.21-11:59. It then complains about a null user. No one has even logged on at this point. I've just added chestshop but I've disabled it and I'm still getting this error. I even made sure i have the latest files. I also get this error after people have logged on. Let me know if you need more info.

Need to see the entire error from the server log, please attach/paste startup log here.

Try updated release:
https://github.com/eccentricdevotion/TARDIS/releases/tag/1.16.5

Probably an auto-farm dispenser somewhere being activated by a redstone clock, will need to add a player != null check...