This error is caused by a conflict between the Jetpack plugin and another plugin on your site, most likely a WooCommerce extension that makes changes to how users are created and managed when making an order.
That’s something we can fix on our end in the Jetpack plugin by being more defensive and trying to account for other plugins that may customize the way users are created on your site. We’ll work on a fix and release it in the next update of the Jetpack plugin. You can follow our progress here .
Until the release, there are 2 things you can do to solve the issue on your site:
- Disable
WP_DEBUG on your production site. PHP warnings like this one are normally not displayed on WordPress sites. They only get displayed when Debug mode is enabled. That seems to be the case on your site. You can disable that mode, and thus disable the warnings, by editing your site’s wp-config.php file, looking for the line mentioning WP_DEBUG , and replacing define( 'WP_DEBUG', true ); by define( 'WP_DEBUG', false ); .
- Disable Jetpack’s WooCommerce Analytics feature. You can do so by going to Jetpack > Settings > Modules in your dashboard. You can read more about it here .
I hope this helps.
