WEM Agent error, "Only a single agent instance can be run within a session!"

Error showing from WEM Agent, "Only a single agent instance can be run within a session!"...

WEM Agent Error: "Connection state changed - WEM agent has detected that the network connection has been lost. Click here to refresh your environment settings"

Random WEM Agent machinesintermittently display the following pop up error message: "WEM Agent Error: "Connection state changed - WEM agent has detected that the network connection has been lost. Click here to refresh your environment settings"...

WEM Agent Connection error: "Broker Server Name or Broker Port Error"

WEM Agent fails to connect to the WEM Broker and shows the following error when manually refreshing the WEM cache using this command: AgentCacheUtility.exe -refreshcache: "Broker Server Name or Broker Port Error"...

WEM Agent: "An error occurred while building your environment. Agent processing will now stop."

WEM Agent produces error saying - "An error occurred while building your environment. Agent processing will now stop."...