Notice in php log

Here is what my log shows:
Notice: Undefined index: wma_redirect in /home/akcesoriameblowe-online/public_html/wordpress/wp-content/plugins/woocommerce-my-account-widget/woocommerce-my-account-widget.php on line 67

I checked the line and this is:

$option = ‘<option value=”‘ . $page->ID . ‘” ‘.selected($instance[‘wma_redirect’],$page->ID,false).’>’;