I have followed the topic to upgrade my system.
Now I have:
#uname -a : FreeBSD Mysystem 13.1-STABLE FreeBSD 13.1-STABLE GENERIC amd64

>The file system (zfs) is mounted readonly,
I made the correction in /etc/rc.conf, if my memory is good,
> the system never shutdown, with the menu or with "# shutdown -p now",
push the power button 3 sec, it is efficient.
> the screensaver can not be inactivated, by the menu or by "xset -dpms" in .xinitrc,
> impossible to change the keyboard map with the menu,
put "exec mate-session && setxkbmap de"
in .xinitrc,
> the software station can not syncing with ???, I don't know, which server?
> the system update can not update:
its window crash, error message:
"Updating GhostBSD repository catalogue...
GhostBSD repository is up to date.
All repositories are up to date.
Checking for upgrades (1077 candidates): ."
> and all the usual problems, like: you can't mount ufs or ntfs file systems, usb or external HD are not always recognized,etc.
> The network works fine, after all, it is great!

Could you format your post to be more clear and more understandable?

Okay:

I have followed the topic to upgrade my system.
Now I have:
"#uname -a : FreeBSD Mysystem 13.1-STABLE FreeBSD 13.1-STABLE GENERIC amd64"

1>The file system (zfs) is mounted readonly,

2> the system never shutdown, with the menu or with "# shutdown -p now",
push the power button 3 sec, it is efficient.

3> the screensaver can not be inactivated, by the menu or by "xset -dpms" in .xinitrc,

4> impossible to change the keyboard map with the menu,
put "exec mate-session && setxkbmap de"
in .xinitrc,

5> the software station can not syncing with ???, I don't know, which server?

6> the system update can not update:
its window crash, error message:
"Updating GhostBSD repository catalogue...
GhostBSD repository is up to date.
All repositories are up to date.
Checking for upgrades (1077 candidates): ."

7> and all the usual problems, like: you can't mount ufs or ntfs file systems, usb or external HD (UFS, MSDOSfs) are not always recognized,etc.

Update station crashes.
And Software station too.
A window propose to click on "detail", but nothing happens.
Well,...
With the CLI:
pkg: Fail to create temporary file /usr.... etc not a directory

Reinstall of openoffice with the CLI
I can read the list of pkg to be upgrade,
reinstall of each pkg, one by one with the software station;
it seems OK.
Update Station crash at start up.
Not finished...

This is probably the problem described in this link: https://forums.ghostbsd.org/viewtopic.p ... 8714f76acb

Has this issue been resolved? on the main page

@toc GhostBSD based on 12 and 13.1 has too many changes in between them Considering 12 has not received any updates for over one year I doubt it would be easily fixable.

You might be missing zfs_enable="YES" in rc.conf. and that will be the core of your problems.

Sorry, I got sidetracked when I saw your message and I forgot to reply back.