Seafile suddenly not available

Hi,
a few weeks ago, I installed Seafile-Server Pro with docker. Everything was fine until a few hours ago.
Seafile-Server is no more available anymore.
I had a look in the log of mariadb:
2023-05-16 19:37:13 0 [Note] mariadbd: Shutdown complete

2023-05-16 19:37:14+00:00 [Note] [Entrypoint]: Entrypoint script for MariaDB Server 1:10.6.12+maria~ubu2004 started.

2023-05-16 19:37:14+00:00 [Note] [Entrypoint]: Switching to dedicated user ‘mysql’

2023-05-16 19:37:14+00:00 [Note] [Entrypoint]: Entrypoint script for MariaDB Server 1:10.6.12+maria~ubu2004 started.

2023-05-16 19:37:14+00:00 [Note] [Entrypoint]: MariaDB upgrade not required

2023-05-16 19:37:14 0 [Note] Starting MariaDB 10.6.12-MariaDB-1:10.6.12+maria~ubu2004 source revision 4c79e15cc3716f69c044d4287ad2160da8101cdc as process 1

2023-05-16 19:37:14 0 [Note] InnoDB: Compressed tables use zlib 1.2.11

2023-05-16 19:37:14 0 [Note] InnoDB: Number of pools: 1

2023-05-16 19:37:14 0 [Note] InnoDB: Using crc32 + pclmulqdq instructions

2023-05-16 19:37:14 0 [Note] mariadbd: O_TMPFILE is not supported on /tmp (disabling future attempts)

2023-05-16 19:37:15 0 [Note] InnoDB: Using Linux native AIO

2023-05-16 19:37:15 0 [Note] InnoDB: Initializing buffer pool, total size = 134217728, chunk size = 134217728

2023-05-16 19:37:15 0 [Note] InnoDB: Completed initialization of buffer pool

2023-05-16 19:37:15 0 [Note] InnoDB: 128 rollback segments are active.

2023-05-16 19:37:15 0 [Note] InnoDB: Creating shared tablespace for temporary tables

2023-05-16 19:37:15 0 [Note] InnoDB: Setting file ‘./ibtmp1’ size to 12 MB. Physically writing the file full; Please wait …

2023-05-16 19:37:15 0 [Note] InnoDB: File ‘./ibtmp1’ size is now 12 MB.

2023-05-16 19:37:15 0 [Note] InnoDB: 10.6.12 started; log sequence number 27068677; transaction id 129052

2023-05-16 19:37:15 0 [Note] Plugin ‘FEEDBACK’ is disabled.

2023-05-16 19:37:15 0 [Note] InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool

2023-05-16 19:37:15 0 [Warning] You need to use --log-bin to make --expire-logs-days or --binlog-expire-logs-seconds work.

2023-05-16 19:37:15 0 [Note] Server socket created on IP: ‘0.0.0.0’.

2023-05-16 19:37:15 0 [Note] Server socket created on IP: ‘::’.

2023-05-16 19:37:15 0 [Note] mariadbd: ready for connections.

Version: ‘10.6.12-MariaDB-1:10.6.12+maria~ubu2004’ socket: ‘/run/mysqld/mysqld.sock’ port: 3306 mariadb.org binary distribution

2023-05-16 19:37:16 0 [Note] InnoDB: Buffer pool(s) load completed at 230516 19:37:16

2023-05-16 19:37:37 6 [Warning] Aborted connection 6 to db: ‘seafile_db’ user: ‘seafile’ host: ‘172.21.0.4’ (Got an error reading communication packets)

2023-05-16 19:37:37 5 [Warning] Aborted connection 5 to db: ‘seafile_db’ user: ‘seafile’ host: ‘172.21.0.4’ (Got an error reading communication packets)

2023-05-16 19:37:37 4 [Warning] Aborted connection 4 to db: ‘seafile_db’ user: ‘seafile’ host: ‘172.21.0.4’ (Got an error reading communication packets)

2023-05-16 19:37:37 3 [Warning] Aborted connection 3 to db: ‘ccnet_db’ user: ‘seafile’ host: ‘172.21.0.4’ (Got an error reading communication packets)

2023-05-16 19:37:38 7 [Warning] Aborted connection 7 to db: ‘unconnected’ user: ‘seafile’ host: ‘172.21.0.4’ (Got an error reading communication packets)

2023-05-16 19:37:38 8 [Warning] Aborted connection 8 to db: ‘ccnet_db’ user: ‘seafile’ host: ‘172.21.0.4’ (Got an error reading communication packets)

2023-05-16 19:37:43 12 [Warning] Aborted connection 12 to db: ‘seafile_db’ user: ‘seafile’ host: ‘172.21.0.4’ (Got an error reading communication packets)
Seafile-log:
Seafile server started

Done.

Starting seahub at port 8000 …

Error:Seahub failed to start.

Please try to run “./seahub.sh start” again

[2023-05-16 21:37:38] Skip running setup-seafile-mysql.py because there is existing seafile-data folder.

Traceback (most recent call last):

File “/scripts/start.py”, line 95, in

main()

File “/scripts/start.py”, line 81, in main

call('{} start'.format(get_script('seahub.sh')))       

File “/scripts/utils.py”, line 70, in call

return subprocess.check_call(*a, **kw)

File “/usr/lib/python3.8/subprocess.py”, line 364, in check_call

raise CalledProcessError(retcode, cmd)

subprocess.CalledProcessError: Command ‘/opt/seafile/seafile-pro-server-9.0.16/seahub.sh start’ returned non-zero exit status 1.

I have no idea, what’s wrong.
Thank You for your help.