Hypoallergenes Luxus-Bettwäsche-Set BAMBUKAS 300g/m2

Fatal error: Uncaught Error: Call to a member function get_stock_quantity() on false
in /home/woollando/htdocs/woollando.com/wp-content/themes/woollando/woocommerce/single-product/add-to-cart/variable.php on line 41

Call stack:

1. getVariationStockQuantity()
   wp-content/themes/woollando/woocommerce/single-product/add-to-cart/variable.php:47
2. filteredVariationStockQuantity()
   wp-content/themes/woollando/woocommerce/single-product/add-to-cart/variable.php:97
3. include('/home/woollando/htdo...to-cart/variable.php')
   wp-content/plugins/woocommerce/includes/wc-core-functions.php:345
4. wc_get_template()
   wp-content/plugins/woocommerce/includes/wc-template-functions.php:1894
5. woocommerce_variable_add_to_cart()
   wp-includes/class-wp-hook.php:324
6. WP_Hook::apply_filters()
   wp-includes/class-wp-hook.php:348
7. WP_Hook::do_action()
   wp-includes/plugin.php:517
8. do_action()
   wp-content/plugins/woocommerce/includes/wc-template-functions.php:1836
9. woocommerce_template_single_add_to_cart()
   wp-includes/class-wp-hook.php:324
10. WP_Hook::apply_filters()
    wp-includes/class-wp-hook.php:348
11. WP_Hook::do_action()
    wp-includes/plugin.php:517
12. do_action()
    wp-content/themes/woollando/woocommerce/content-single-product.php:32
13. require('/home/woollando/htdo...t-single-product.php')
    wp-includes/template.php:812
14. load_template()
    wp-content/plugins/woocommerce/includes/wc-core-functions.php:284
15. wc_get_template_part()
    wp-content/themes/woollando/woocommerce/single-product.php:30
16. include('/home/woollando/htdo...e/single-product.php')
    wp-includes/template-loader.php:106
17. require_once('/home/woollando/htdo.../template-loader.php')
    wp-blog-header.php:19
18. require('/home/woollando/htdo...m/wp-blog-header.php')
    index.php:17