After Update NC 13.0.2 no connection with my Ubuntu client to the server

On my notebook I have installed Ubuntu 17.10. After the update to NC 13.0.2 it’s not possible to connect to the server. The client shows following message: No connection to Nextcloud

Does anyone have an idea?

What does ifconfig say on your notebook?

Have you tried to remove the connection and then reconnect?

I don’t know why but it works now (I did nothing). I will inform you if it happens again.