Hi, I have a problem with putting Area on my server, when I use tool it shows up "Area is Invalid!" I don't know what could be causing this problem

Hey, most likely issue is either that you've selected two block positions from two different dimensions or one of the positions is above the world height limit. Please make sure you've checked these!

It turned out that the plugin for many dimensions caused an error with selecting blocks but format fixed this, but now there is another problem in the config file, I changed some commands so that normal players could change them like Explosions etc. and that everyone could take only one land. But none of this works players can still claim more than one land and still cannot change the flag.