And to add to @glistwan’s post: it seems that the host part of the URL server is not resolved correctly.
First thing you should try is of course use the IP address of the sytem instaed of it’s name to see if you can connect.
When you can connect it is definitely a name resolve problem. And there @glistwan’s tip comes in. But also /etc/resolv.conf might be worth a visit (to check if they are the same.
A question here is where the name server is to be solved. Do you have a DNS server inyour LAN or do you use /etc/hosts for local addresses. When the latter is true of course check* /etc/hosts.*