I can't log in Unity on Linux

I use Linux Mint 18 Sarah 64-bit version with Cinnamon. I’ve decided to install Unity3d 5.1.0f3 from following website:

Unity Comes to Linux: Experimental Build Now Available | Unity Blog.

I downloaded it as .deb package and I extracted it write command sudo dpkg -i unity-editor-5.1.0f3+2015082501_amd64.deb in terminal. When I’m trying run Unity3d from menu and log in then I’m receiving following error:

Service not available, please try again later.
I shown it on this screenshot: Imgur: The magic of the Internet. Can anybody help me?

I got the Editor to run by entering the following from the Terminal window:

LD_PRELOAD=/lib/x86_64-linux-gnu/libresolv.so.2 /opt/Unity/Editor/Unity