attachment_id error in header.php

  • Hello,
    I use Lovecraft theme for a running event website.
    Since I’ve upgraded to wordpress 5.8.3 on my synology NAS (5.8.2 before), I’ve a error in every page :

    Notice: Trying to get property 'attachment_id' of non-object in xxx/wordpress/wp-content/themes/lovecraft/header.php on line 149

    The line 149 is:
    $header_image_alt = get_post_meta( $header_image_data->attachment_id, '_wp_attachment_image_alt', true );

    I don’t understand where is the problem with this ‘attachment_id’ ?
    Thanks for your help.

    Matthieu

    • This topic was modified 2 years, 6 months ago by mccolson.

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