WSUS: Error: Connection Error

I am running WSUS services on Windows 2008 R2 Standard. Since 3-4 weeks I am getting below error and memory utilization is high too. Can you please help me to solve this, Let me know if I need to share more information on this. enter image description here ยท windows-server-2008 wsus.

Windows 2008 VPS via WSUS: Error: Connection Error.