Support » Fixing WordPress » Add a custom namspace declaration

  • I would like to add the following namespace:


    but I don’t know where excactly in wp-admin/admin-header.php

    I’ve already tried to find some hints in the forum, but without success.

    any hints?

    Many thanks in advance a “Happy Easter”

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  • I’ve also tried the addthis-xmlns plug-in but after the installation I get even more errors!

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