Missing argument 1 errors

I′m very beginner here, so that question may be stupid but as I didnt find answer from anywhere else, then maybe somebody can explain. Im getting following errors, how shall I fix it?
1.error:
Warning: Missing argument 1 for WP_Internal_Pointers::enqueue_scripts() in /data01/virt31242/domeenid/www.xn--vabahukeskus-uib.ee/joulumaa/joulumaa/wp-admin/includes/template.php on line 1728
line 1728 looks like this:
public static function enqueue_scripts( $hook_suffix ) {

2.error:
Warning: Missing argument 1 for voyage_load_template_scripts() in /data01/virt31242/domeenid/www.xn--vabahukeskus-uib.ee/joulumaa/joulumaa/wp-content/themes/voyage/inc/lib-admin.php on line 311
line 311 looks like this:
function voyage_load_template_scripts( $hooks ) {

3.error on plugin admin site and appears after I deleted plugin “custom sidebars” (from WPMUDEV):
Warning: Illegal offset type in isset or empty in /data01/virt31242/domeenid/www.xn--vabahukeskus-uib.ee/joulumaa/joulumaa/wp-admin/includes/update.php on line 186

line 186 looks like this:
if ( !isset( $current->response[ $file ] ) )

thank you in advance