Adsense GDPR consent message - add logo

Question

I have enabled the Adsense GDPR consent message on my site - it works fine. However I'd like to customize it by adding my logo.

Google say:

Add a logo to a site message

• Sign in to your AdSense account.
• Click Privacy & messaging.
• Click GDPR.
• In the list of messages, click Edit in the row with the message you want to edit.
• Click Header in the menu sidebar.
• Turn on the Logo toggle to automatically display your site's logo in your message.
• Click Apply style to update the message.
• If no logo is found, turn off the Logo toggle. Leaving the toggle turned on when there is no logo to display may prevent you from being able to publish the message.

In my case the site logo is not found and I can't find where or how to add one.

Answer 1

Click: > Privacy & messaging > GDPR > Messages > [message style] Edit > Site settings > edit > Logo > Add