Unhandled exception when running sample and calling CoConnect

[Lisk90]

I set up the sample according to the readme instructions, but get an unhandled exception when doing the following:

1. Start SimpleServer. Seems to be running fine: https://i.imgur.com/bwTWLuL.png
2. Start Unity Client and call CoConnect via coroutine in the Start() method: https://i.imgur.com/T7beFy7.png
3. Server throws this: https://i.imgur.com/p8FfFlj.png ("Duplicate add MessageReader")