ERR_CONNECTION_REFUSED to TVHEADEND server (9981) or Webinterface (8080) after upgrade libreelec from 10.0.4 to 11.0.3

If my problem does not belong here please point me in the right direction. Keep in mind I'm not a native speaker.

I used LibreELEC 10.0.4 on a headless RPi 3B which worked well until I did a manual to 11.0.3 today (ssh connection from Ubunto 23.04 to the RPi, cd /storage/.update,

wget http://releases.libreelec.tv/LibreELEC-RPi2.arm-11.0.3.img.gz and reboot.

I can still open a ssh connection to the RPi or ping the RPi, but no browser connection to 9981 or 8080.

Since updates went well for a very long time I did not backup the memory card (I know: no backup - no mercy).

Help and ideas are welcome.

rgds. from Vienna,Austria,

Heinz

Solved! Temporary connected RPi to TV, attached keyboard and mouse and found updates for addons. Ran those updates and all is well now.