Today I have successfully logged in with development version in linux launcher. It show this separate windows for credential and after correct enter of it, it closes and I get logged in. Not stopped in white window)) But in release or in beta version it still white window after correctly entered credentials
NAME="Linux Mint" VERSION="18 (Sarah)" ID=linuxmint ID_LIKE=ubuntu PRETTY_NAME="Linux Mint 18" VERSION_ID="18" UBUNTU_CODENAME=xenial Linux ******* 4.4.0-21-generic #37-Ubuntu SMP Mon Apr 18 18:33:37 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux