Tibor Paulsch

@ BuffBillfan I don’t see the problem you describe, using Firefox or Safari. In FF though, the yellow header background does not show up.

@dmchale I guess we should thank Tom Raftery (with my excuse for misspeling his name earlier).

@journeyguy: what theme are you using then? Does it have a sidebar manager of it’s own, or something like that?

And are you able to access the other admin pages? (as in: https://www.yourdomain.com/wp-admin/plugins.php).

To fix the error:
navigate to your K2 folder -> app -> includes
edit the file widgets-removal.php as below

Change the contents of the file from:

< ?php
if (get_option('k2sidebarmanager') == '1') {
remove_action('plugins_loaded', 'wp_maybe_load_widgets', 0);
}
?>
to

< ?php
if (get_option('k2sidebarmanager') == '1') {
remove_action('plugins_loaded', 'wp_maybe_load_widgets', 0);
if( is_admin() )
{global $pagenow; if( $pagenow == 'index.php' ) wp_maybe_load_widgets();
}
}
?>

Many thanks to Tom Raferty!