Have just build Arch packages which should compatible with the last developer build. By missing qtwebengine_locales shall these copyed from the install to the launcher directory. In the scripts i have reenabled the using of the internal wine version so its up to you now 
After changing to this version you should update the launcher binaries to the Beta version in Menu->Settings->Version Type
@CCP_Bartender found a glitch in the tarball, you have most of the depended libs 3 times copied instead copying the lib and 2 shortened symlinks to her. Maybe wrong parameter by rsync (following symlinks instead copy symlinks). Would save space in the tarball and in the launcher directory.