Problems after update to WP 4.3

After i updated to WP 4.3, this text is repeated through the page:

in /customers/4/5/2/ on line 3457 Notice: Den anropade konstruktormetoden för WP_Widget har fasats ut sedan version 4.3.0! Använd istället


Yes, WP changed constructor from version 4.3, old constructors will continue to work and this is just Notice. You can edit wp-config.php file in order to change
define('WP_DEBUG', true);
define('WP_DEBUG', false);
and notices will be gone.

We will change constructors in next theme update. If you wish you can fix this by yourself by changing following code:
for files located inside theme folder / widgets and notices will be gone.

Best Regards