This is my config (AreaSize)

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Has the issue been resolved?

Please, explain the bug and also be careful of what you're pasting because that text definitely has something wrong.

If i open the mod
Than i go to Crystalspider
Than to harvestwithease
Than to Config
And than to AreaSize.class
Because i wanna change the size

You don't have to open the mod.
You have to install the mod and open the Minecraft instance folder. There you will find the config folder with the configuration file.

I dont see a another config folder?
I only see this if i open the mod

That's not the way to change it.
When you first create a world with the mod installed, a configuration file will be generated under the config folder.
That's the file you should change. You will see in the file an option for the area size.

You mean here?

Yes, there.
Go into the config folder and you will see a file called harvestwithease-common.toml.

Has the issue been resolved?

you can close this i check his post on other mod problems he also installes wrong mod versions for the wrong minecraft client and never close his issues

The issue is resolved!