Rule was updated so it doesn’t force redirection to MainWP plugin after login.
You can use this code snippet:
function admin_default_page() {
return '/wp-admin/admin.php?page=mainwp_tab';
}
add_filter('login_redirect', 'admin_default_page');
in the PHP Section of the Custom Dashboard extension to set custom redirection rule. After logging in, you will be redirected right to the MainWP Overview page.