Fatal error: Uncaught Error: Undefined class constant 'WEBPAGE_HASH'
in /usr/hosts/domains/shiftdelete.net/public_html/wp-content/themes/shiftdelete/inc/yoast/schemas/class-thb-seo-product-schema.php on line 43

Call stack:

  1. Yoast\W\S\G\S\Thb_Seo_Product_Schema::generate()
    wp-content/plugins/wordpress-seo/src/generators/schema-generator.php:128
  2. Yoast\W\S\G\Schema_Generator::generate_graph()
    wp-content/plugins/wordpress-seo/src/generators/schema-generator.php:75
  3. Yoast\W\S\G\Schema_Generator::generate()
    wp-content/plugins/wordpress-seo/src/presentations/indexable-presentation.php:720
  4. Yoast\W\S\P\Indexable_Presentation::generate_schema()
    wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php:66
  5. Yoast\W\S\P\Abstract_Presentation::__get()
    wp-content/plugins/wordpress-seo/src/presenters/schema-presenter.php:61
  6. Yoast\W\S\P\Schema_Presenter::get()
    wp-content/plugins/wordpress-seo/src/presenters/schema-presenter.php:45
  7. Yoast\W\S\P\Schema_Presenter::present()
    wp-content/plugins/wordpress-seo/src/integrations/front-end-integration.php:406
  8. Yoast\W\S\I\Front_End_Integration::present_head()
    wp-includes/class-wp-hook.php:324
  9. WP_Hook::apply_filters()
    wp-includes/class-wp-hook.php:348
  10. WP_Hook::do_action()
    wp-includes/plugin.php:517
  11. do_action()
    wp-content/plugins/wordpress-seo/src/integrations/front-end-integration.php:377
  12. Yoast\W\S\I\Front_End_Integration::call_wpseo_head()
    wp-includes/class-wp-hook.php:324
  13. WP_Hook::apply_filters()
    wp-includes/class-wp-hook.php:348
  14. WP_Hook::do_action()
    wp-includes/plugin.php:517
  15. do_action()
    wp-includes/general-template.php:3052
  16. wp_head()
    wp-content/themes/shiftdelete/header.php:34
  17. require_once()
    wp-includes/template.php:790
  18. load_template()
    wp-includes/template.php:725
  19. locate_template()
    wp-includes/general-template.php:48
  20. get_header()
    wp-content/themes/shiftdelete/single.php:2
  21. include()
    wp-includes/template-loader.php:106
  22. require_once()
    wp-blog-header.php:19
  23. require()
    index.php:17

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