Invalid options object. dev server has been initialized using an options object that does not match the api schema. – options.allowedhosts[0] should be a non-empty string.

The error message “invalid options object. dev server has been initialized using an options object that does not match the api schema. – options.allowedhosts[0] should be a non-empty string.” indicates that there is an issue with the configuration options used to initialize a development server.

The allowedhosts option is used to specify a list of hostnames or IP addresses that are allowed to access the development server. In this case, the error states that the first value in the allowedhosts array should be a non-empty string.

Below is an example of how the options object should be configured correctly:

    const options = {
      allowedhosts: ["localhost"], // Array of allowed hosts (non-empty string values)
      port: 3000, // Port on which the development server will listen
      hotreload: true, // Enable hot reload functionality
      // Other options...
    };
  

In the example above, the allowedhosts array contains a single value, which is “localhost”. This means that only requests originating from “localhost” will be allowed to access the development server. You can add additional hostnames or IP addresses as needed.

It is important to ensure that the value provided for allowedhosts[0] is a valid, non-empty string. Otherwise, the error will occur.