Ok so the show must go on:
"Sep 13 10:12:10 => Healtheck error: Error: connect ECONNREFUSED 172.18.16.250:80
Sep 13 10:12:20 => Healtheck error: Error: connect ECONNREFUSED 172.18.16.250:80
Sep 13 10:12:30 => Healtheck error: Error: connect ECONNREFUSED 172.18.16.250:80
Sep 13 10:12:40 => Healtheck error: Error: connect ECONNREFUSED 172.18.16.250:80
Sep 13 10:12:50 => Healtheck error: Error: connect ECONNREFUSED 172.18.16.250:80
Sep 13 10:13:00 => Healtheck error: Error: connect ECONNREFUSED 172.18.16.250:80
Sep 13 10:13:10 => Healtheck error: Error: connect ECONNREFUSED 172.18.16.250:80
Sep 13 10:13:20 => Healtheck error: Error: connect ECONNREFUSED 172.18.16.250:80"
on a fresh installation of Nextcloud.
Also the system is extremely slow.