Problem with creating a map with the Editor

Hey guys, i’m following the official Modding guide and i reached the section of the level editor. I do everything as asked but when i click ok after chosing the name of the level nothing happens and i can’t even click on cancel button. Eveything seems freezed. I have to force close the program.
Anyone knows why this happens and how can i resolve this? Thank you
I add an image to show the point i’m stuck at.

First you have to extract the base game maps using a tool, GrimArc can extract the files and use MapDecompiler inside the extracted folder .
You need to extract the Levels.arc located inside the gdx2\resources directory , after you extracted and used the MD in the extracted folder .Create a new mod +go to source and copy the levels into it , also create a maps folder if it does not already exist and copy world001.sd and world001.wrl into it.
That should be it but you do not have to do all that if you download this [MOD/RESOURCE] Campaign Map (Template)

Good Luck .