System Update Failed

yunohost tools update
Traceback (most recent call last):
File “/usr/bin/yunohost”, line 219, in
timeout=opts.timeout,
File “/usr/lib/python2.7/dist-packages/moulinette/init.py”, line 136, in cli
moulinette.run(args, output_as=output_as, password=password, timeout=timeout)
File “/usr/lib/python2.7/dist-packages/moulinette/interfaces/cli.py”, line 390, in run
ret = self.actionsmap.process(args, timeout=timeout)
File “/usr/lib/python2.7/dist-packages/moulinette/actionsmap.py”, line 495, in process
return func(**arguments)
File “/usr/lib/moulinette/yunohost/tools.py”, line 412, in tools_update
if not cache.update():
File “/usr/lib/python2.7/dist-packages/apt/cache.py”, line 443, in update
raise FetchFailedException(e)
apt.cache.FetchFailedException: E:The method driver /usr/lib/apt/methods/https could not be found.

The last error comes surely from the fact the apt-transport-https package is not installed.
Can you do in cli (command-line through ssh for example) ? :

sudo apt install apt-transport-https && sudo apt update && sudo apt dist-upgrade