Fatal error: Uncaught Error: Call to undefined function is_woocommerce()
in /home/arkaco/domains/arkacontrols.com/public_html/wp-content/themes/IranAvada-Child/includes/wc-orderby-instock.php on line 19

Call stack:

1. iWC_Orderby_inStock_Status::order_by_stock_status()
   wp-includes/class-wp-hook.php:326
2. WP_Hook::apply_filters()
   wp-includes/plugin.php:256
3. apply_filters_ref_array()
   wp-includes/class-wp-query.php:2955
4. WP_Query::get_posts()
   wp-includes/class-wp-query.php:3852
5. WP_Query::query()
   wp-includes/class-wp-query.php:3984
6. WP_Query::__construct()
   wp-content/themes/IranAvada/includes/lib/inc/functions.php:956
7. fusion_cached_query()
   wp-content/themes/IranAvada/includes/class-awb-maintenance-mode.php:350
8. AWB_Maintenance_Mode::get_library_templates()
   wp-content/themes/IranAvada/includes/options/maintenance.php:29
9. avada_options_section_maintenance()
   wp-content/themes/IranAvada/includes/class-avada-options.php:156
10. Avada_Options::set_sections()
    wp-content/themes/IranAvada/includes/class-avada-options.php:108
11. Avada_Options::__construct()
    wp-content/themes/IranAvada/includes/class-avada-options.php:125
12. Avada_Options::get_instance()
    wp-content/themes/IranAvada/includes/class-avada.php:716
13. Avada::get_options()
    wp-content/themes/IranAvada/includes/class-avada-init.php:159
14. Avada_Init::init()
    wp-includes/class-wp-hook.php:324
15. WP_Hook::apply_filters()
    wp-includes/class-wp-hook.php:348
16. WP_Hook::do_action()
    wp-includes/plugin.php:517
17. do_action()
    wp-settings.php:700
18. require_once()
    wp-config.php:96
19. require_once()
    wp-load.php:50
20. require_once()
    wp-blog-header.php:13
21. require()
    index.php:17