Swarm not starting build

I am using Swarm in stand alone mode. It opens but never starts the lightbuild. Version 4.0.2 works, but newer versions do not.
Swarm log pasted below

10:37:46 AM: [Connection] Detected new local connection from same process ID as an existing one, closing the old one
10:37:46 AM: [CloseConnection] Closing connection 76A774DB using handle 76A774DB
10:37:46 AM: [CloseConnection] Connection confirmed for disconnection 76A774DB
10:37:46 AM: [CloseConnection] Closing orphaned Job ()
10:37:46 AM: [PostJobStatsToDB] Database error:
10:37:46 AM: [PostJobStatsToDB] Object reference not set to an instance of an object.
10:37:46 AM: [CloseConnection] Connection disconnected 76A774DB
10:37:46 AM: [GetMessage] Safely returning to 76A774DB with no message
10:37:46 AM: [MaintainConnections] Local connection has closed (76A774DB)
10:37:46 AM: [MaintainConnections] Removed connection 76A774DB
10:37:48 AM: [Interface:TryOpenConnection] Local connection established
10:37:48 AM: [Interface:OpenJob] Error:

I solved this by reformatting my drives, re-installing Windows, service packs, .net framework, and UE4.