Turris 1.x not rebooting

Hello,
I have Turris 1.1 (=Modrak), I added there the uSD card and have now:

|Device|Turris 1.x|
|reForis version|1.4.1|
|Turris OS version|6.2.3|
|Turris OS branch|[HBS]
Kernel version 5.10.163

Since about a month I am unable to restart it (the button in reforis also doesnt do anything - I just copy here the output from bash):
root@xxx:~# reboot
root@xxx:~# reboot
root@xxx:~# date
Thu Feb 16 09:02:19 CET 2023
root@xxx:~# date
Thu Feb 16 09:03:22 CET 2023
root@xxx:~# dmesg | tail -n5
[909775.691351] kmodloader: no module folders for kernel version 5.10.163 found
[909775.745504] kmodloader: no module folders for kernel version 5.10.163 found
[1555226.526237] nfs: server 10.0.0.2 not responding, timed out
[1555228.206245] nfs: server 10.0.0.2 not responding, timed out
[1555229.726237] nfs: server 10.0.0.2 not responding, timed out
(the nfs server messages are already very old, the point is there is no message in dmesg)

I’m able to reboot only using “echo b > /proc/sysrq-trigger”.
Any ideas please?