Code works in single player but not on server (part 2)

So I made this post a while back but I goofed and put the links in wrong so here is part 2

Basically I am trying to make a mod that introduces a craftable item allowing you to revive dead players in a hardcore server. I've checked everything I think could be the issue probably over 30 times and nothing so I've come to see what you all think.

Code:

https://drive.google.com/file/d/1QLXmbxhV_qsB-2302Yx8L8q1jUhU1J5o/view?usp=sharing

Video of Issue (I should be turned to survival mode and yes I have tried with other players in the server):

https://drive.google.com/file/d/1e_9LKO-X0Rr6pIRHgPjdSoJHT3t8AEQO/view?usp=sharing