Fatal error: Uncaught Error: strstr(): Argument #1 ($haystack) must be of type string, WP_Error given
in /var/www/vhosts/pasdiamonds.com/httpdocs/wp-includes/functions.php on line 1147

Call stack:

1. strstr()
   wp-includes/functions.php:1147
2. add_query_arg()
   wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-widget.php:380
3. WC_Widget::get_current_page_url()
   wp-content/plugins/woocommerce/includes/widgets/class-wc-widget-layered-nav-filters.php:51
4. WC_Widget_Layered_Nav_Filters::widget()
   wp-includes/widgets.php:1261
5. the_widget()
   wp-content/themes/flatsome/woocommerce/loop/filter-button.php:30
6. require()
   wp-includes/template.php:812
7. load_template()
   wp-content/plugins/woocommerce/includes/wc-core-functions.php:284
8. wc_get_template_part()
   wp-content/themes/flatsome/inc/woocommerce/structure-wc-category-page-header.php:107
9. flatsome_add_category_filter_button()
   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/flatsome/woocommerce/layouts/headers/category-title.php:23
13. require()
    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/flatsome/inc/woocommerce/structure-wc-category-page-header.php:63
16. flatsome_category_header()
    wp-includes/class-wp-hook.php:324
17. WP_Hook::apply_filters()
    wp-includes/class-wp-hook.php:348
18. WP_Hook::do_action()
    wp-includes/plugin.php:517
19. do_action()
    wp-content/themes/flatsome/header.php:37
20. require_once()
    wp-includes/template.php:810
21. load_template()
    wp-includes/template.php:745
22. locate_template()
    wp-includes/general-template.php:48
23. get_header()
    wp-content/themes/flatsome/woocommerce/archive-product.php:23
24. include()
    wp-content/plugins/woocommerce/includes/wc-core-functions.php:345
25. wc_get_template()
    wp-content/plugins/woocommerce/templates/taxonomy-product-cat.php:22
26. include()
    wp-includes/template-loader.php:106
27. require_once()
    wp-blog-header.php:19
28. require()
    index.php:17