Joy
(@joyously)
A Yoast team member answered this question where you asked it in Slack.
Jip Moors:
Are you using the latest versions of the plugins?
This can also be caused by other plugins if they use a specific deprecated action to output HTML. If you know how to inspect a web page you can check if you see any HTML output before the <html> tag.
This appears to be a bug with Gutenberg. It has to do with the overflow of the editor view in CSS (Don’t hit me up about incorrect terminology please!).
But with a bit of hacking I got this to work
Add to functions.php
add_action('admin_head', 'my_scroll_admin_fix');
function my_scroll_admin_fix() {
echo '<style>
#wpwrap .edit-post-visual-editor .editor-writing-flow {
max-width: calc( 1200px - 40px );
overflow: visible;
}
</style>';
}