Solved YAML File not being set

I've used YAML files before and set values in them, but for some reason, they are refusing to work this time. This is what I have and it's worked before so I don't know why it won't now:

Code:

SettingsManaager settings = new SettingsManager();
 
public void onEnable() {
 
settings.setup(this);
 
settings.getData().set("example.welcome.test", "This is s test");
 
}

My SettingsManager is the class where I create and manage all the files. When I run the plugin, the data.yml is created but the example.welcome.test is not

Bump

EDIT by Moderator: merged posts, please use the edit button instead of double posting.