Steam multiplayer project not working in 4.14

I had a steam multiplayer project working in 4.13, but after upgrading to the preview, it is not working anymore. It cannot find any sessions. Are there any changes I should be aware of?

Post this on answerhub or it won’t get fixed. I would also recommend posting in the preview thread here: Unreal Engine 4.14 Preview - Announcements and Releases - Unreal Engine Forums