After the update from 6.9.2 to 6.12.6 ,
my web gui no longer works. My array is no longer displayed no pool nothing. SMB does not work anymore either. And the dialog boxes open but no text is available

tower-diagnostics-20231224-1208.zip

Try booting in safe mode first to rule out any plugin issues.

Just tried it makes no difference.

You can try redoing the flash drive, backup the current one first and then redo it and just restore the bare minimum, like the key, super.dat and the pools folder for the assignments, also copy the docker user templates folder, if all works you can then reconfigure the server or try restoring a few config files at a time from the backup to see if you can find the culprit.

Do you run VMs with hardware pass-through?

Several things I see from diagnostics:

Dec 24 11:55:55 Tower smbd[11556]:   smbd version 4.17.12 started.
Dec 24 11:55:55 Tower smbd[11556]:   Copyright Andrew Tridgell and the Samba Team 1992-2022
Dec 24 11:55:55 Tower root:                  /usr/sbin/wsdd2 -d -4
Dec 24 11:55:55 Tower smbd[11557]: [2023/12/24 11:55:55.294156,  0] ../../source3/smbd/server.c:1097(smbd_open_one_socket)
Dec 24 11:55:55 Tower smbd[11557]:   smbd_open_one_socket: open_socket_in failed: Cannot assign requested address
Dec 24 11:55:55 Tower smbd[11557]: [2023/12/24 11:55:55.294221,  0] ../../source3/smbd/server.c:1097(smbd_open_one_socket)
Dec 24 11:55:55 Tower smbd[11557]:   smbd_open_one_socket: open_socket_in failed: Cannot assign requested address
Dec 24 11:55:55 Tower smbd[11557]: [2023/12/24 11:55:55.294238,  0] ../../source3/smbd/server.c:1264(open_sockets_smbd)
Dec 24 11:55:55 Tower smbd[11557]:   open_sockets_smbd: No sockets available to bind to.
Dec 24 11:55:55 Tower smbd[11557]: [2023/12/24 11:55:55.294437,  0] ../../lib/util/fault.c:173(smb_panic_log)
Dec 24 11:55:55 Tower smbd[11557]:   ===============================================================
Dec 24 11:55:55 Tower smbd[11557]: [2023/12/24 11:55:55.294456,  0] ../../lib/util/fault.c:174(smb_panic_log)
Dec 24 11:55:55 Tower smbd[11557]:   INTERNAL ERROR: open_sockets_smbd() failed in pid 11557 (4.17.12)
Dec 24 11:55:55 Tower smbd[11557]: [2023/12/24 11:55:55.294467,  0] ../../lib/util/fault.c:178(smb_panic_log)
Dec 24 11:55:55 Tower smbd[11557]:   If you are running a recent Samba version, and if you think this problem is not yet fixed in the latest versions, please consider reporting this bug, see https://wiki.samba.org/index.php/Bug_Reporting
Dec 24 11:55:55 Tower smbd[11557]: [2023/12/24 11:55:55.294483,  0] ../../lib/util/fault.c:183(smb_panic_log)
Dec 24 11:55:55 Tower smbd[11557]:   ===============================================================
Dec 24 11:55:55 Tower smbd[11557]: [2023/12/24 11:55:55.294499,  0] ../../lib/util/fault.c:184(smb_panic_log)
Dec 24 11:55:55 Tower smbd[11557]:   PANIC (pid 11557): open_sockets_smbd() failed in 4.17.12
Dec 24 11:55:55 Tower smbd[11557]: [2023/12/24 11:55:55.294679,  0] ../../lib/util/fault.c:292(log_stack_trace)
Dec 24 11:55:55 Tower smbd[11557]:   BACKTRACE: 9 stack frames:
Dec 24 11:55:55 Tower smbd[11557]:    #0 /usr/lib64/libgenrand-samba4.so(log_stack_trace+0x2e) [0x1492bf77c64e]
Dec 24 11:55:55 Tower smbd[11557]:    #1 /usr/lib64/libgenrand-samba4.so(smb_panic+0x9) [0x1492bf77c8a9]
Dec 24 11:55:55 Tower smbd[11557]:    #2 /usr/lib64/libsmbd-base-samba4.so(+0xdcbd5) [0x1492bfbedbd5]
Dec 24 11:55:55 Tower smbd[11557]:    #3 /usr/lib64/libsmbd-base-samba4.so(+0xdd053) [0x1492bfbee053]
Dec 24 11:55:55 Tower smbd[11557]:    #4 /usr/lib64/libsmbd-shim-samba4.so(exit_server+0x14) [0x1492bf781264]
Dec 24 11:55:55 Tower smbd[11557]:    #5 /usr/sbin/smbd(main+0x15df) [0x55f29f8643af]
Dec 24 11:55:55 Tower smbd[11557]:    #6 /lib64/libc.so.6(+0x236b7) [0x1492bf5466b7]
Dec 24 11:55:55 Tower smbd[11557]:    #7 /lib64/libc.so.6(__libc_start_main+0x85) [0x1492bf546775]
Dec 24 11:55:55 Tower smbd[11557]:    #8 /usr/sbin/smbd(_start+0x21) [0x55f29f864b31]
Dec 24 11:55:55 Tower smbd[11557]: [2023/12/24 11:55:55.294764,  0] ../../source3/lib/dumpcore.c:315(dump_core)
Dec 24 11:55:55 Tower smbd[11557]:   dumping core in /var/log/samba/cores/smbd

Samba is crashing.

 

From ethtool, the NIC is a Realtek R8169.  I suspect this may be the issue.

How can i fix this Problem? 

Do you use Jumbo Frames on the network?   This is known to cause issues with some NICs.