Cannot add nodes on a new polling engine

Overview

Unable to connect to endpoint intermittently when trying to add in a new node.

List resources just spinning or just appears to be loading.

Environment

NPM 11.5.3

Cause 

Intermittent connection

Resolution

1. Log in to the server hosting your SolarWinds Orion installation as an administrator.
2. Run the Orion Service Manager, and click Shutdown Everything.
3. Close the Orion Service Manager.
4. Run the OrionPlatform-v2015.1.35100-HotFix1.exe, and follow the instructions in the installation wizard.