Temporary failure in name resolutionThis can be resolved by restarting the network manager:
sudo systemctl restart systemd-resolved.service
This manifests i.e. in being unable to work with anything certificate related, as the boards factory date is not updated and therefor behind the real date/time. This can be resolved by restartarting the time sync service (and verified by date):
sudo systemctl restart systemd-timesyncd
No route to hostLikely a problem with the routing table, start investigation by printing current routing table to screen:
ip route