Your Plugin Breaks the Single Product View

I had to disable it because there is a fatal issue that I had not noticed before. It seems it appears randomly just on some product pages, the others are fine.

[18-May-2019 23:13:26 UTC] PHP Fatal error: Uncaught Error: Call to a member function get_id() on boolean in /home/xxx/public_html/wp-content/plugins/woocommerce-boost-sales/frontend/single_upsells.php:156
Stack trace:
#0 /home/xxx/public_html/wp-content/plugins/woocommerce-boost-sales/frontend/single_upsells.php(95): VI_WBOOSTSALES_Frontend_Single_Upsells->show_product(‘37242’, 0)
#1 /home/xxx/public_html/wp-includes/class-wp-hook.php(286): VI_WBOOSTSALES_Frontend_Single_Upsells->init_upsells(”)
#2 /home/xxx/public_html/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array)
#3 /home/xxx/public_html/wp-includes/plugin.php(465): WP_Hook->do_action(Array)
#4 /home/xxx/public_html/wp-includes/general-template.php(2762): do_action(‘wp_footer’)
#5 /home/xxx/public_html/wp-content/themes/porto/footer.php(139): wp_footer()
#6 /home/xxx/public_html/wp-includes/template.php(722): require_once(‘/home/xxx…’)
#7 /home/xxx/public_html/wp-includes/template.php(671): load_templat in /home/xxx/public_html/wp-content/plugins/woocommerce-boost-sales/frontend/single_upsells.php on line 156

And the effect is that random product images are displayed in the product page instead of the proper product. Messed up.