PHP 8.4 still shows the other 2 warnings for TU 1.17.1.

[nicolepaschen]

Deprecated: Boldgrid_Backup_Admin_Archive::__construct(): Implicitly marking parameter $core as nullable is deprecated, the explicit nullable type must be used instead in wp-content/plugins/boldgrid-backup/admin/class-boldgrid-backup-admin-archive.php on line 146

Deprecated: phpseclib3\Net\SSH2::exec(): Implicitly marking parameter $callback as nullable is deprecated, the explicit nullable type must be used instead in wp-content/plugins/boldgrid-backup/vendor/phpseclib/phpseclib/phpseclib/Net/SSH2.php on line 2829