You are presented with a lovely error like this.
Error: Connection Error
Click Reset Server Node to try to connect to the server again
What ultimately will typically fix this, is correcting the memory size in the IIS Pool
- Open IIS
- Expand your server, click on Application Pools
- Right-Click WsusPool
- Choose Advanced Settings, scroll to the bottom
- Change Private Memory Limit (KB) to 0 for unlimited
- Recycle IIS Pool on the right.
- Restart IIS
Enjoy trouble-free WSUS!