[Plugin: Multiple Featured Images] Error when updating page/post

  • Hello Marcus,

    Great plugin:) I have added Set Featured Image 2, and it shows in admin just fine, I can add 2 featured images to my page/post, but when I try to Update (publish) I get the following error:

    Warning: Cannot modify header information – headers already sent by (output started at /home/xxxxxx/public_html/xxxxx/wp-content/themes/mytheme/functions.php:26) in /home/xxxxx/public_html/xxxxx/wp-includes/pluggable.php on line 866

    Any advice would be so much appreciated.
    Thanx
    Tracey

    https://www.ads-software.com/extend/plugins/multiple-featured-images/

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