[sooo much lag]

 Minehut is having some performance issues right now, it should be good tomorrow

[I can't OP myself on my own server?]

Try typping op <your name> on the console without the /

[Command Block banning player]

You can disable command blocks on the minehut panel.

[Invisibility change?]

huh, for me its completely transparent (aside from the particles ofc) idk what your problem might be

[KeepInventory Plugin]

You can toggle keepinventory on the server settings

-1