Problem with LabelBMFont

I am using cocos2d-x v.3.11 full version
I have BM font created by littera - font.fnt and font.png
I put files in res/fonts/

in resources.js

var res = {
barfont : “res/fonts/font.fnt”
}

in app.js

var label1 = new cc.LabelBMFont(“Testcase”, res.barfont);
this.addChild(label1);

result
in log
cc.LabelBMFont._parseCommonArguments(): only supports 1 page
cc.LabelBMFont._parseImageFileName() : file could not be found

error
CCDebugger.js:316 loader for [null] not exists!

What is wrong?
Can somebody help me?