Hi all, I'm installing for a first time Minecraft Java ed. on my own server (running on FreeNas). The idea was my kids to play with some friends. However, when I started in Creative mode, the inventory has no tabs. ()
I guess this is something related to the server properties but I am not able to find what is the reason

Could someone give any advice or hint where/what to look for?

Thanks in advance
Todor