Hello,

On all pages, front and wp-admin, we are getting this error since the latest WooCommerce update (its in dutch but you should be able to get the english from translation):

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Notice: De aangeroepen constructor methode voor WP_Widget is verouderd sinds versie 4.3.0! Gebruik

__construct()

in plaats daarvan. in /home/xxxxxxxxxxxxxx/public_html/wp-includes/functions.php on line 3457

Notice: De aangeroepen constructor methode voor WP_Widget is verouderd sinds versie 4.3.0! Gebruik

__construct()

in plaats daarvan. in /home/xxxxxxxxxxxxxx/public_html/wp-includes/functions.php on line 3457

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I think it may have something to do with the cart icon on the right top as this also has disappeared since this error.

I have disabled and enabled several plugins with no change.
When I change theme the error disappears.

We run the latest version of WP, WC and the theme. All other updates are also up to date.