[PROBLEM] Local UI does not start after software update

[Tim Curtis]

After doing an in place update to 8.3.9, the local UI does not start (leaving the bootup console output on the screen)

I have traced the issue to the file /lib/systemd/system/localui.service

localui.service:

[Unit]

Description=Start Chromium Browser
After=nginx.service php7.4-fpm.service mpd.service

[Service]
Type=simple

# start xserver
ExecStart=/usr/bin/xinit

User=pi

[Install]
WantedBy=multi-user.target

Note that User=pi   This is NOT the correct user.

The file localui.service is generated by the code in worker.php.  Worker.php gets the username via a system call, and so it seems that the incorrect name is setup elsewhere.

Any thoughts?

P.S.
 This also happened the previous time that I did an inplace update, but I just reflashed the system.
This time I think it requires a fix.

Thanks
 -Wally

What userid did you specify when you made the < 8.3.9 image using the Raspberry Pi Imager?