(still alpha version) For some reason, a file did not survive the zip/unzip process.
Hence, download in "History" tag the fix 1.0.1 for OMX, i.e. the file "Orbiter.Multiplayer.client.dll" and place / replace it into Modules/Plugin/DotNET of your Obiter 2016 + OMX 1.0.0.
If it works for you, please add a "rating" for the next orbinauts to install it as well.
I hope I will find out soon what's wrong while zipping/unzipping this file specifically.