PHP Warning: Trying to access array offset

Hello Stephan,

Thank you for the excellent and detailed bug report, including the specific error message and your system versions. This is incredibly helpful.

The PHP warning you’re seeing indicates that a setting in your email notification configuration may be wrong.

The quickest and most effective way to resolve this is to reset and re-save your general email settings. Please follow these steps:

1. From your WordPress dashboard, navigate to Support → Email Notifications → General Settings.
2. Click the “Reset default” button.
3. After the page reloads, please re-enter your details on the same page (such as “From Name” and “From Email”).
4. Click the “Submit” button to save the fresh settings.

This process clears any invalid data from the database and should stop the warning from appearing in your logs.

Please let us know if the issue persists after trying this.