i cannot even make a crafting table in mineplex survival even if i have claimed my own land it pops up 1 second then the table is unmade and returned to planks in my bags,, i can't play mineplex survival at all by myself

everything i try crafting in  my own claimed land or out in the open i try to create things i can't even make a crafting table it won't let me create anything anything i try to make it resets to what it was, crafting table>planks , planks >logs , my internet is fine, the server is buggy really bad.