[Gravy(Graves) Not Working]

I installed the graves plugin and restarted the server but when my friend died with 3/4 nethrite armor and tools it did not work. 

[Whitelisting]

I want to play with my friends but random people just join and the whitelist does not work. I tried the whitelist GUI but it does not work.

[Not letting me upload a world]

It worked thank you

 

 

[Not letting me upload a world]

no not yet

 

[Not letting me upload a world]

It wont let me upload a world that I already have and I have tried everything I can think of.