https://github.com/JaccoR/hass-entso-e/issues/263
https://github.com/JaccoR/hass-entso-e/issues/254
System becomes unusable, no web UI
Temporary fix :
core stop
login
cd /mnt/data/supervisor/homeassistant
mkdir -p disabled_custom_components
mv custom_components/entsoe disabled_custom_components/
exit
core start
Another way to get back up and running :
core restart --safe-mode
Use the Web UI to disable the integration and restart.