Failed to load components from manifest file

xtrabackup version 8.0.34-29 based on MySQL server 8.0.34 Linux (x86_64) (revision id: 5ba706ee)
231208 17:10:41 version_check Connecting to MySQL server with DSN ‘dbi:mysql:;mysql_read_default_group=xtrabackup;mysql_socket=/tmp/mysql02.sock’ as ‘root’ (using password: NO).
231208 17:10:41 version_check Connected to MySQL server
231208 17:10:41 version_check Executing a version check against the server…
231208 17:10:41 version_check Done.
2023-12-08T17:10:41.381048+08:00 0 [Note] [MY-011825] [Xtrabackup] Connecting to MySQL server host: localhost, user: root, password: not set, port: not set, socket: /tmp/mysql02.sock
2023-12-08T17:10:41.385429+08:00 0 [Note] [MY-011825] [Xtrabackup] Using server version 8.0.34
2023-12-08T17:10:41.387410+08:00 0 [Note] [MY-011825] [Xtrabackup] Executing LOCK INSTANCE FOR BACKUP …
2023-12-08T17:10:41.388404+08:00 0 [Note] [MY-011825] [Xtrabackup] uses posix_fadvise().
2023-12-08T17:10:41.388432+08:00 0 [Note] [MY-011825] [Xtrabackup] cd to /home/mysql/mysql8/data02
2023-12-08T17:10:41.388442+08:00 0 [Note] [MY-011825] [Xtrabackup] open files limit requested 0, set to 1024
2023-12-08T17:10:41.389141+08:00 0 [Note] [MY-011825] [Xtrabackup] using the following InnoDB configuration:
2023-12-08T17:10:41.389162+08:00 0 [Note] [MY-011825] [Xtrabackup] innodb_data_home_dir = .
2023-12-08T17:10:41.389169+08:00 0 [Note] [MY-011825] [Xtrabackup] innodb_data_file_path = ibdata1:12M:autoextend
2023-12-08T17:10:41.389186+08:00 0 [Note] [MY-011825] [Xtrabackup] innodb_log_group_home_dir = ./
2023-12-08T17:10:41.389192+08:00 0 [Note] [MY-011825] [Xtrabackup] innodb_log_files_in_group = 2
2023-12-08T17:10:41.389199+08:00 0 [Note] [MY-011825] [Xtrabackup] innodb_log_file_size = 50331648
xtrabackup: Unknown error 1126
xtrabackup: Unknown error 3529
2023-12-08T17:10:41.390343+08:00 0 [ERROR] [MY-013709] [Server] Received an error while processing components from manifest file: Failed to load components from manifest file
2023-12-08T17:10:41.390361+08:00 0 [ERROR] [MY-011825] [Xtrabackup] failed to init keyring component


How have you installed xtrabackup? using the tarball ?
If so, can you please try to set --xtrabackup-plugin-dir= and pass the lib/plugin folder inside the tarball?