It is likely something else is bound to port 80, preventing lighttpd from running. You are using hass and if I recall, that installs it own web interface. Run this command to see what is listening on ports used by Pi-Hole:
Logs begin at Thu 2016-11-03 17:16:49 GMT, end at Sat 2019-01-05 15:03:02 GMT. --
> Jan 05 13:21:51 DietPi systemd[1]: Starting Lighttpd Daemon...
> Jan 05 13:21:52 DietPi systemd[1]: Started Lighttpd Daemon.
> Jan 05 13:21:52 DietPi lighttpd[713]: 2019-01-05 13:21:52: (log.c.171) opening errorlog '/var/log/lighttpd/error.log' failed: No such file or directory
> Jan 05 13:21:52 DietPi systemd[1]: lighttpd.service: Main process exited, code=exited, status=255/n/a
> Jan 05 13:21:52 DietPi systemd[1]: lighttpd.service: Unit entered failed state.
> Jan 05 13:21:52 DietPi systemd[1]: lighttpd.service: Failed with result 'exit-code'.
> Jan 05 13:21:52 DietPi systemd[1]: lighttpd.service: Service hold-off time over, scheduling restart.
> Jan 05 13:21:52 DietPi systemd[1]: Stopped Lighttpd Daemon.
> Jan 05 13:21:52 DietPi systemd[1]: Starting Lighttpd Daemon...
> Jan 05 13:21:52 DietPi systemd[1]: Started Lighttpd Daemon.
> Jan 05 13:21:52 DietPi lighttpd[747]: 2019-01-05 13:21:52: (log.c.171) opening errorlog '/var/log/lighttpd/error.log' failed: No such file or directory
Thanksssssss
I have:
-Created the missing log folder and error file
-set log folder, error file and light... Folder and internal file with chmod 777 (i know rude mode)
And now it Works
Thanks