php 8.0 error

Your plugin is throwing an error after I upgraded to php 8.0. Here is the result of the fatal error. When I disabled your plugin, the fatal error stopped…when I renabled, it came back. Oddly the error is being thrown on the admin side of wordpress.

2022-03-07T20:35:55+00:00 CRITICAL Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class Wp_Igsp_Admin does not have a method "wp_igsp_upgrade_page_link_blank" in /home/XXXXXXXXXX/public_html/wp-includes/class-wp-hook.php:307
Stack trace:
#0 /home/XXXXXXXXXX/public_html/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters()
#1 /home/XXXXXXXXXX/public_html/wp-includes/plugin.php(474): WP_Hook->do_action()
#2 /home/XXXXXXXXXX/public_html/wp-admin/admin-footer.php(78): do_action()
#3 /home/XXXXXXXXXX/public_html/wp-admin/admin.php(297): require_once('...')
#4 {main}
  thrown in /home/XXXXXXXXXX/public_html/wp-includes/class-wp-hook.php on line 307