Redstone Duper not working

[Mxsik]

So I am working on a couple of Redstone Machines on my Server and for some reason my Cobblestone Generator wont work. The Redstone Signal isnt connected to the TNT Duping Machinen and the Coral added to it gets destroyes for some reason. I am on 1.16.5 

[CoolProgrammer]

Hello.

In-case PaperMC patched this dupe, there should be an option to allow that in paper.yml file of your server.

You could check by going into File Manager tab, and opening paper.yml file.

Then look for the option, change it, Save the file, Restart the server, and try again.