In the meantime, you can deactivate logging on your website, just turn WP_DEBUG to false. You can find this constant in in your wp-config.php file, just before the line that says ‘That’s all, stop editing! Happy blogging.’:
You're trying to setup your theme but you're experiencing errors when importing the demo content? Or you've just followed the setup guide but your website doesn't look exactly like our demo? These are common issues for which you can find easy and quick fixes.