TypeError: Cannot destructure property 'auth' of 'urlObj' as it is undefined.

Read this: prerender-error | Next.js. For my personal case, set fallback: false in getStaticPath() and I encountered also the problem of trailing slash. On the original WP, I use /about/ instead of /about. Add trailingSlash: true to the next.config.js fixes the problem.

This error indicates that the 'auth' property is being destructured from an object called 'urlObj', but the 'urlObj' itself is undefined.

To resolve this issue, you need to make sure that 'urlObj' is defined before attempting to destructure its properties. You can do this by checking if 'urlObj' is truthy before proceeding with the destructuring.

Here's an example of how you can fix this error:

// Assuming urlObj is defined elsewhere in the code
if (urlObj) {
  const { auth } = urlObj;
  // Rest of the code using the 'auth' variable
} else {
  // Handle the case when urlObj is undefined
}

Make sure to check where 'urlObj' is supposed to be defined and ensure it is assigned a valid value before you try to destructure its properties.

Additionally, if you have encountered a problem with trailing slashes in Next.js when using WP, adding the 'trailingSlash: true' option to the 'next.config.js' file can fix the issue. This option ensures that URLs with trailing slashes are considered valid by Next.js.

I also recommend referring to the error message and the provided link ("prerender-error | Next.js") for more specific information related to your personal case.