nodejs-storage: bucket.upload(filePath, options) producing an 404 error with detail-less description

Well, the title couldn’t be clearer, this is one of the detail-less error’s description I’ve ever seen, all I get is “Not Found” (after upgrading to 3.1.0 it also added the headers object, that also doesn’t means anything to me), I don’t even know what haven’t been found (but I can be sure it’s not about the file in filePath, 'cause this produced another [detailed] error).

Hope that someone will be able to help me, 'cause I don’t even know where to start looking to fix this.

Environment details

• OS: macOS
• Node.js version: 10.12.0
• npm version: 6.10.2
• @google-cloud/storage version: 3.1.0

What I’ve already tried to do

1. In https://console.cloud.google.com I’ve added the rule Storage Admin in addition to Owner to the mail in the google-key.json file (that passed to Storage() constructor).
2. Comment out the options, so it will be only bucket.upload(filePath) and may upload the file to the top level directory.
3. Chang storage rules to:

service firebase.storage {
  match /b/{bucket}/o {
      allow read: if true;
      allow delete: if true;
      allow write: if true;
  }
}

and

service firebase.storage {
  match /b/{bucket}/o {
      allow read: if request.auth != null;
      allow delete: if request.auth != null;
      allow write: if request.auth != null;
  }
}

Steps to reproduce

Call

bucket.upload(filePath, {
        destination: destPath
      }).then(() => {
        res.end('Successfully uploaded!');
      }).catch((err) => {
        res.end('Failed to upload: ' + JSON.stringify(err));
      });

and get this error in the catch() calback:

Failed to upload: 
{  
  "code":404,
  "errors":[  
    {  
      "domain":"global",
      "reason":"notFound",
      "message":"Not Found"
    }
  ],
  "response":{  
    "headers":{  
      "alt-svc":"quic=\":443\"; ma=2592000; v=\"46,43,39\"",
      "content-length":"165",
      "content-type":"application/json; charset=UTF-8",
      "date":"Thu, 15 Aug 2019 13:58:50 GMT",
      "server":"UploadServer",
      "vary":"Origin, X-Origin",
      "x-guploader-uploadid":"AEnB2Ur6Hhd5uVLDCSH...A8pw7rD1-g"
    }
  },
  "message":"Not Found"
}

Also, I’m getting some unclear message in the console (if thats related), don’t understand from what should I be “careful” and right now I’m using the emulator on my mac, so it’s not production:

⚠  Google API requested!
   - URL: "https://www.googleapis.com/oauth2/v4/token"
   - Be careful, this may be a production service.
⚠  Google API requested!
   - URL: "https://www.googleapis.com/upload/storage/v1/b/my-projectf/o?uploadType=multipart&name=path%2to%2Ffile.jpg"
   - Be careful, this may be a production service.

Thanks, Ido.