Issue when stating ember server: "let isText = null ^^^^^^"

[iorrah]

Hi all,

I am having this warning when running ember server:

$ ember server
version: 0.1.7
Could not find watchman, falling back to NodeWatcher for file system events

/Users/my-user/my-application/node_modules/ember-cli-zero-clipboard/node_modules/ember-cli-babel/node_modules/broccoli-babel-transpiler/node_modules/broccoli-persistent-filter/node_modules/async-disk-cache/node_modules/istextorbinary/source/index.js:19
    let isText = null
        ^^^^^^
Livereload server on port 35729
Serving on http://0.0.0.0:4200/

On my package.json file, I am using:

"devDependencies": {
    "ember-cli-zero-clipboard": "^1.0.2"
}

Is this issue caused by some error during the dependence installation process?

Thank you in advance for any help.