Torbirdy is not updated for Thunderbird 60.5.x
Thunderbird 60.5.0 introduces a huge change to the automatic account configuration code. One of the XUL element id:s that Torbirdy references has changed, leading to breakage if you enable the automatic account configuration wizard, like in Tails: https://redmine.tails.boum.org/code/issues/16573
To upload designs, you'll need to enable LFS and have admin enable hashed storage. More information