Unknown error when setting up NextJS config

[Janealter]

Unknown error when setting up NextJS config:

Injecting property=output and value=export in:
import bundleAnalyzer from '@next/bundle-analyzer';
const withBundleAnalyzer = bundleAnalyzer({
  enabled: process.env.ANALYZE === 'true',
});
export default withBundleAnalyzer({
  reactStrictMode: false,
  eslint: {
    ignoreDuringBuilds: true,
  },
  experimental: {
    optimizePackageImports: ['@mantine/core', '@mantine/hooks'],
  },
});
Error: TypeError: error must be an instance of Error

[Janealter]

As I tested, this is because my config contains

import bundleAnalyzer from '@next/bundle-analyzer';

const withBundleAnalyzer = bundleAnalyzer({
  enabled: process.env.ANALYZE === 'true',
});

[Janealter]

I think this PR solves the issue - #161