Re-init Variations Fatal error

Hello! I have a problem with this plugin. Some products do not appear and when I try to select the option “re-init varation”, a “fatal error” message appears.

The error that appears is the following:

An error of type E_ERROR has occurred on line 139 of the file /home/sentido3/public_html/5sentidos.es/wp-content/plugins/wpc-show-single-variations/includes/class-admin.php. Error message: Uncaught Error: Call to a member function get_menu_order () on bool in /home/sentido3/public_html/5sentidos.es/wp-content/plugins/wpc-show-single-variations/includes/class-admin.php : 139

Stack trace:

# 0 /home/sentido3/public_html/5sentidos.es/wp-includes/class-wp-hook.php(287): Woosv_Admin-> setting_page_content (”)

# 1 /home/sentido3/public_html/5sentidos.es/wp-includes/class-wp-hook.php(311): WP_Hook-> apply_filters (”, Array)

# 2 /home/sentido3/public_html/5sentidos.es/wp-includes/plugin.php(478): WP_Hook-> do_action (Array)

# 3 /home/sentido3/public_html/5sentidos.es/wp-admin/admin.php(254): do_action (‘wpclever% e2% 9a% …’)

# 4 {main}

thrown

I leave here the data that I have for template, woocommerce, etc:

WordPress version 5.4.4

Current topic: Storefront Child (version 2.5.8.1594987248)

Current Plugin: WPC Show Single Variations for WooCommerce (version 1.2.0)

PHP version 7.3.25

Thank you for your time!