I already encountered one issue: the HADK guide tells me to follow `repo` installation instruction at https://source.android.com/setup/develop#installing-repo , but if I install repo from there, it quits because the Python is too old (3.4 vs 3.6 needed). Then I installed older one for python2, but now I have the following error:

```
nergzd@nergzd-desktop:~$ repo init -u git://github.com/mer-hybris/android.git -b hybris-14.1
Get https://gerrit.googlesource.com/git-repo/clone.bundle
Get https://gerrit.googlesource.com/git-repo
remote: Counting objects: 1, done
remote: Finding sources: 100% (124/124)
remote: Total 124 (delta 64), reused 124 (delta 64)
Receiving objects: 100% (124/124), 135.69 KiB | 1.46 MiB/s, done.
Resolving deltas: 100% (64/64), completed with 21 local objects.
From https://gerrit.googlesource.com/git-repo
   ddab060..ad8aa69  main       -> origin/main
   d34af28..ddab060  stable     -> origin/stable
 * [new tag]         v2.13.8    -> v2.13.8

object d92076d930af11bb9a3025a6b2f12ca139c0436f
type commit
tag v1.13.11
tagger Mike Frysinger <vapier@google.com> 1581473106 -0500

repo 1.13.11

gpg: Signature made Wed Feb 12 02:05:06 2020 UTC
gpg:                using DSA key 16530D5E920F5C65
gpg: Can't check signature: public key not found


fatal: cloning the git-repo repository failed, will remove '.repo/repo'
```
 
I can't find anything about it on the web, is this issue known?