No repository field is not an error, but rather a warning that occurs when a package is missing the repository field in its package.json file. The repository field is used to indicate where the source code for the package is hosted, but it's not strictly necessary for a package to function.
If this warning appears in a project you're managing (and not just during a global install), you can add the repository field to your package.json file.
{
"name": "your-project-name",
"version": "1.0.0",
"description": "Your project description",
"repository": {
"type": "git",
"url": "https://github.com/your-username/your..."
}
}