Teleport Player with a command block don't work

[trungus]

Hi guys

I'm trying to do a simple thing, I place a button and a command block ( I use the info of this post to place and edit the command block https://forum.cuberite.org/thread-2978.html), the idea is to use the command block to teleport any player that use the button with command

Code:

/tp @p x y z

but when the command block is executed nothing happens, using the NiLSPACE plugin to get the result I receive an error (see attachments)

I already test this world in a Vanilla Minecraft and work without an issue.

Do you have some idea?

Best Regards
Trungus