Warning woocommerce.cls.php on line 453

please try

edit that file , line 448

find 2 lines

		$sale_from = get_post_meta( $id, '_sale_price_dates_from', true ) ;
		$sale_to = get_post_meta( $id, '_sale_price_dates_to', true ) ;

replace them to

$sale_from = (int) get_post_meta( $id, '_sale_price_dates_from', true ) ;
$sale_to = (int) get_post_meta( $id, '_sale_price_dates_to', true ) ;

then see how it goes

I tried on staging and the warning dissapeard. Now I have a big sale on production. Is it safe to try it there?

/edit

I can see it generates a warnings in another plugin:

PHP Warning: Undefined array key “mapfrom” in /wp-content/plugins/woo-product-feed-pro/classes/class-get-products.php on line 4664

PHP Warning: Undefined array key “mapfrom” in /wp-content/plugins/woo-product-feed-pro/classes/class-get-products.php on line 4807

• This reply was modified 1 year, 11 months ago by Adam.
• This reply was modified 1 year, 11 months ago by Adam.
• This reply was modified 1 year, 11 months ago by Adam.

yes, this code just turn a number string to integer , should be safe to use as long as that string comes with number , which it is supposed to be a number

for other plugin , I’d suggest to check up with their team

@qtwrk thx for your help.

Will this change be included in the next version of LSC? Is this an official patch?

yes , it will be added