Your configFile is invalid: /path/to/project/cypress.config.js

Binding to the on('dev-server:start') event is no longer necessary.

Please update your code to use the component.devServer() function.

{
  component: {
    devServer (cypressDevServerConfig, devServerConfig) {
      // start dev server here
  }
}

Learn more: https://on.cypress.io/dev-server