What server-side configurations (e.g., PHP memory limit) might contribute to 'WordPress Error JSON' errors, and how can I adjust them?

Insufficient PHP memory limit, low maximum execution time, or restrictive server security settings can cause the error. Increase the PHP memory limit by adding `define( 'WP_MEMORY_LIMIT', '256M' );` to your `wp-config.php` file. You might also need to adjust the `max_execution_time` in your `php.ini` file. Contact your hosting provider for assistance with server-side configurations.