Impossible to install UBports on the latest Fairphone 2

[Anne017]

What happened:
Impossible to install UBports on the latest Fairphone 2

Steps to reproduce:

• Latest Appimage from https://github.com/ubports/ubports-installer/releases downloaded.
• AppImage made executable.
• Double-click on the file.
• Fairphone 2 received last week (with Android 6.1) and connected to the computer with a USB cable.
• Device not found, selected manually ("Fairphone 2" in the list).
• Channel "15.04/devel" selected in the install options, and "Wipe" checkbox ticked.
  Note: the devel channel is used instead of stable to allow the compatibility with Android 6.1, as explained in this issue.
• Password from the computer entered.
• Power and volume down buttons pressed down until reboots (bootloader black screen with FAIRPHONE POWERED BY ANDROID).
• Nothing happens after several minutes (no feed-back, no "Next" button in the GUI).

What I expected to happen:
Continuation of the installation (UBports robot with eyes blinking, restart on Ubuntu Touch).

Logs:
None (?).

Software Version:
Computer on Ubuntu 16.04 LTS (updates done).

[NeoTheThird]

Might be caused by #39. There's no problem with installing FPs.

[NeoTheThird]

Thanks for reporting! I'm pretty sure it's related to #39, so let's track it there.