When concatenating require.js modules into one error?

Question

JavaScript

Good afternoon!
I use require.js
I want to optimize the plug-in js for production, I use r.js for this,
the optimization config itself

({
    appDir: "../",
    baseUrl: "new/javascript/modules",
    dir: "../dist",
    mainConfigFile: "../main.js",
    name: "main"
})

and reqiure.js modules configuration
when running the build command node r.js -o app.build.js
, an error occurs

Error: Error: toString failed
    at Buffer.toString (buffer.js:377:11)

Can you help me figure out what could be the problem?