Conflict hook name (action / filter) “upgrader_post_install”

Hi,
I’m getting an error when visiting the Abandoned Cart page of the ActiveCampaign for WooCommerce plugin.
I believe the problem is due to the addition of an action hook with the same name as a WordPress filter hook: “upgrader_post_install”.
The file is: /plugins/activecampaign-for-woocommerce/admin/class-activecampaign-for-woocommerce-admin.php. Line 743.

The PHP error is:

PHP Fatal error: Uncaught ArgumentCountError: Too few arguments to function Envato_Theme_Setup_Wizard::upgrader_post_install(), 1 passed in public_html/wp-includes/class-wp-hook.php on line 307 and exactly 2 expected in public_html/wp-content/themes/flatsome/inc/admin/envato_setup/envato_setup.php:235
Stack trace:
#0 public_html/wp-includes/class-wp-hook.php(307): Envato_Theme_Setup_Wizard->upgrader_post_install('')
#1 public_html/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters('', Array)
#2 public_html/wp-includes/plugin.php(474): WP_Hook->do_action(Array)
#3 public_html/wp-content/plugins/activecampaign-for-woocommerce/admin/class-activecampaign-for-woocommerce-admin.php(743): do_action('upgrader_post_i...')
#4 public_html/wp-content/plugins/activecampaign-for-woocommerce/admin/views/activecampaign-for-woocommerce-abandoned-cart-display.php(31): Activecampaign_For_Woocommerce_Admin->get_total_abandoned_ in public_html/wp-content/themes/flatsome/inc/admin/envato_setup/envato_setup.php on line 235

Line 235 of the envato_setup.php file is:

/**
* After a theme update we clear the setup_complete option. This prompts the user to visit the update page again.
*
* @since 1.1.8
* @access public
*/
public function upgrader_post_install($return, $theme) {
if ( is_wp_error( $return ) ) {
    return $return;
}
if ( $theme != get_stylesheet() ) {
    return $return;
}
update_option( 'envato_setup_complete', false );

return $return;
}

The hook used:

add_action('upgrader_post_install', array($this,'upgrader_post_install'), 10, 2);

I have already contacted theme support. They suggested that I contact you.
Thank you.