Problem/Bug Unable to Place Command Blocks

So I recently went to place a command block on my server and it doesn't let me. When I worldedit one in it shows up but it doesn't let you enter the interface. It also disappears when you try breaking/placing a block near it. I am op, in creative, and away from spawn protection (It's 0 in this world). It also doesn't work in any of the other worlds in the server.
Thank you for reading and please help if you can!

The plugins I have installed are:
BetterSleeping3, BuycraftX, ChatFilter, DropHeads, Essentials, EssentialsSpawn, HolographicDisplays, Lobby, LPC, LuckPerms, Multiverse-Core, Multiverse-Inventories, Multiverse-NetherPortals, Multiverse-Portals, MultiverseSpawn, PluginConstructorAPI, ServerAnnouce, SpawnerSilk, TimeMachine, Towny, TownyChat, TownyNameUpdate, TsunamiListener, Vault, Votifer, Worldedit, Worldguard