Plugin activation issue

Hi
We has migrate our website from Hostinger shared server to AWS lightsail VPS server.

Issue: After the migration all plugins has been activated perfectly accept support board and also I’m getting the error when i click activate button (check the attached files also)

Fatal error: Uncaught Error: mysqli object is already closed in /bitnami/wordpress/wp-content/plugins/supportboard/supportboard/include/functions.php:219 Stack trace: #0 /bitnami/wordpress/wp-content/plugins/supportboard/supportboard/include/functions.php(219): mysqli->set_charset() #1 /bitnami/wordpress/wp-content/plugins/supportboard/supportboard/include/functions.php(204): sb_db_init_settings() #2 /bitnami/wordpress/wp-content/plugins/supportboard/supportboard/include/functions.php(4095): sb_db_check_connection() #3 /bitnami/wordpress/wp-content/plugins/supportboard/index.php(238): sb_installation() #4 /opt/bitnami/wordpress/wp-includes/class-wp-hook.php(308): sb_on_activation() #5 /opt/bitnami/wordpress/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters() #6 /opt/bitnami/wordpress/wp-includes/plugin.php(517): WP_Hook->do_action() #7 /opt/bitnami/wordpress/wp-admin/plugins.php(194): do_action() #8 {main} thrown in /bitnami/wordpress/wp-content/plugins/supportboard/supportboard/include/functions.php on line 219

How can i solve this issue?

Thanks