get_formatted_legacy – Fehlermeldung in WordPress

get_formatted_legacy will be used if you call:

$item_meta = new WC_Order_Item_Meta( $item['data'] );

Needs to be updated to:

$item_meta = new WC_Order_Item_Meta( $item );

In whatever plugin is throwing the notice.

in which file must i change this?

I assume a plugin is calling it; gateway. I cannot tell you which – I don’t think its core.

When i search in all files, i can only find it in the “WooCommerce” Directory.

Well yeah its in WC, but another plugin will be using WC_Order_Item_Meta and passing incorrect arguments to it.

In which way can i find out, which Plugin it is?

Downloading them all and searching for WC_Order_Item_Meta. Possibly a gateway.