Undefined array key

Hey there, @lisaxdfsjh! Thanks for contacting us. I’m happy to help you.

I use the Astra theme and have tried using a standard theme for troubleshooting but the issue persists. Also, I do not have Jetpack installed, but the URL mentions that plugin. There also seems to be a typo in the URL (“automattic”); could this be causing the issue?

Thanks for the information and the screenshot!

Automattic (with two Ts) is the name of the company that owns Jetpack, WooCommerce, etc, so it is not a typo 🙂

The line seems to be from WooPayments, which uses Jetpack (even if you don’t have the plugin) to connect to WordPress.com.

I’d like to understand your site properly. Please share with us the necessary information below for us to investigate the issue further:

System Status Report which you can find via WooCommerce > Status > Get system report > Copy for support.
Fatal error logs (if any) under WooCommerce > Status > Logs. Then you can use the selector to search for Fatal Errors.
You could copy and paste your reply here or paste it via https://gist.github.com/ and send the link here.

Looking forward to your reply.

Have a wonderful day!

I have the same issue on check out page:

Undefined array key 0 in /home/emsmassa/public_html/wp-content/plugins/woocommerce-payments/vendor/automattic/jetpack-sync/src/modules/class-woocommerce-hpos-orders.php on line 204

The page: https://emsmassager.eu/de/checkout/

I have changed the payment plugin..So I deleted WooPayments and installed Payment plugin for Stripe. Now it is fine.