Hmmmm. It doesn't make sense.
There has to be something, somewhere.
Those screenshots were taken AFTER a restore and while you have the issue?
The assumption is there is a problem with server-manager, but I am wondering if you actually have network issues.
What error do you get in your browser trying to access the server manager?
Can you ping the server?
Can you ping from the server to your router or internet?
Can you ssh to the server?
What is your network configuration?