/tp command not working

Hello,

On my server, I placed a command block on a block behind a button and set it to run "/tp @p [coordinates]". This works whenever I put it into a normal singleplayer world, however it does not seem to be working on any of my Aternos worlds.

The plugins I have on the server are Skins Restorer, WorldEdit, EssentialsX, and GeyserMC.

Thanks!

After playing around with some other commands, I've learned that it's just in general whenever I try and use @p, @a, or @e, it doesn't seem to work.

I tried /give @a, and it told me "Error: Unspecified player." When I changed it to my username, it worked. I don't know what's going on.