SolarWinds Orion API Failing with this Error

Getting this error while Connecting to SolarWinds Orion API on Port 17774

"Cannot connect to SolarWinds. One or more errors occurred. An error occurred while sending the request. The underlying connection was closed: An unexpected error occurred on a send. Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. An existing connection was forcibly closed by the remote host"

Can someone please help with this?