Zarp has upgraded it's servers and is now under a new host, which is why you are experiencing this.
You can see the relevant announcement HERE.

You can connect to your favorite server by copying and pasting the following in your GMOD console and then pressing 'enter':

Zarp has upgraded it's servers and is now under a new host, which is why you are experiencing this. You can see the relevant announcement [url=https://zarpgaming.com/index.php/forum/announcement/id-354]HERE[/url]. You can connect to your favorite server by copying and pasting the following in your GMOD console and then pressing 'enter': [code]connect darkrp.zarpgaming.com:27015[/code]