Unknown plugin "transform-runtime" specified

This error message typically occurs when the "transform-runtime" Babel plugin is not installed or configured properly.

To resolve this issue, you can try the following steps:

1. Install the "babel-plugin-transform-runtime" package using npm or yarn:

npm install --save-dev babel-plugin-transform-runtime

or

yarn add --dev babel-plugin-transform-runtime

2. Add the plugin to your Babel configuration file (.babelrc or babel.config.js):

{
  "plugins": [
    "transform-runtime"
  ]
}

Note: If you're using Babel 7, you should use the "@babel/plugin-transform-runtime" package instead.

{
  "plugins": [
    "@babel/plugin-transform-runtime"
  ]
}

3. Restart your development server and try running your code again.

If you're still encountering the error after following these steps, you may need to check your Babel configuration or seek additional help.