Function _load_textdomain_just_in_time was called incorrectly.

[kuebel]

If you get the error

Notice: Function _load_textdomain_just_in_time was called incorrectly. Translation loading for the sparkling domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later.

move in functions.php in the theme directory the following lines up to function sparkling_setup()

global $site_layout;
$site_layout = array(
'side-pull-left' => esc_html__( 'Right Sidebar', 'sparkling' ),
'side-pull-right' => esc_html__( 'Left Sidebar', 'sparkling' ),
'no-sidebar' => esc_html__( 'No Sidebar', 'sparkling' ),
'full-width' => esc_html__( 'Full Width', 'sparkling' ),
);