Load Test Controller - 3212: Could not authenticate the Agent Control Service

Possible Cause Resolution
The agent requires a password and encryption is enabled. The agent’s server certificate could not be found or a required dynamic link library (.dll) is missing (for example "ssleay32.dll"). However, note that the agent control service does not report an error when it is started, if this is the problem. Your best option is to re-install the remote agent, because missing certificates or dynamic link libraries are indications that the agent was not installed correctly.