It seems is not working on Paper 1.21.1. Weird because everything is loading, but when placing the sign on the chest, the sign is inmediatly destroyed and the servers send a warning that my deathchest has been destroyed.
There are so many plugins out that just teleport you to the chest where you died which can cause an awful death loop. This plugin avoids that and is exactly what I needed.
Excellent plugin. I have a bunch of other plugins installed but my players always exclaim how awesome this one is, it's their favourite! Easy to setup and just works. If you are looking for a death chest, look no further.