Cannot modify header information – headers already sent by

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When saving settings in “Search Appearance” for Yoast SEO Plugin i received an error message:

Warning: Cannot modify header information – headers already sent by (output started at /wp-content/plugins/convertkit/admin/class-convertkit-admin-tinymce.php:104) in /wp-includes/pluggable.php on line 1355

When looking at “class-convertkit-admin-tinymce.php:104” i came across a html script that doesnt look like it belongs in this file:

<script type=”text/template” id=”tmpl-convertkit-quicktags-modal”>
<div id=”convertkit-quicktags-modal”>
<div class=”media-frame-title”><h1>Title</h1></div>
<div class=”media-frame-content”>Content</div>
</div>
</script>

I have reinstalled the ConvertKit plugin but the problem still remains.

• This topic was modified 5 minutes ago by simonbowles2009.
• This topic was modified 3 minutes ago by simonbowles2009.