Installing UC20 in Virtuabox triggers invalid signature after ubuntu-boot not found

[Haze]

@ijohnson

This is likely because you created an account with console-conf, and hence are already managing the device, and we don’t by default allow you to create another user account from the command line with snap create-user if there is already a “system user” on the account (console-conf also calls create-user internally, which creates your LP user as the “system user”)

Apparently creating a new key and registering it fixed this error. Nonetheless, when I create a system user, it pops an error, although it creates the user assertion.

error: cannot sign assertion: cannot sign using GPG: /usr/bin/gpg --personal-digest-preferences SHA512 --default-key <mykeyID> --detach-sign failed: exit status 2 ("gpg: WARNING: unsafe ownership on homedir '/home/zap2x/.snap/gnupg'\ngpg: signing failed: No such file or directory\ngpg: signing failed: No such file or directory\n")
Done. You may copy auto-import.assert to a USB stick and insert it into an unmanaged Core system, after which you can log in using the username and password you provided.

That means that the even if the user assertion is created but does not include the one i’m trying to create, it will never be created in the device where I insert that assertion, right? Since it cannot sign with my key, it will do it with one of the cannonical?

How do I fix this? Is it just a permission issue fixable with chmod? both the /gnugp and its contents belongs to my user and the permissions are set as follows:

zap2x@LaPajareria:~/Desktop/newUC20$ ll /home/zap2x/.snap/
total 16
drwx------  3 zap2x zap2x 4096 feb 12 10:49 ./
drwxr-xr-x 33 zap2x zap2x 4096 feb 12 10:59 ../
-rw-------  1 zap2x zap2x  163 feb 12 10:49 auth.json
drwx------  4 zap2x zap2x 4096 feb 12 11:07 gnupg/
     
zap2x@LaPajareria:~/Desktop/newUC20$ ll /home/zap2x/.snap/gnupg/
total 32
drwx------ 4 zap2x zap2x 4096 feb 12 11:07 ./
drwx------ 3 zap2x zap2x 4096 feb 12 10:49 ../
drwx------ 2 zap2x zap2x 4096 feb 12 10:56 openpgp-revocs.d/
drwx------ 2 zap2x zap2x 4096 feb 12 10:56 private-keys-v1.d/
-rw-rw-r-- 1 zap2x zap2x 3828 feb 12 10:56 pubring.kbx
-rw-rw-r-- 1 zap2x zap2x 2562 feb 12 10:54 pubring.kbx~
srwx------ 1 root  root     0 feb 12 11:07 S.gpg-agent=
srwx------ 1 root  root     0 feb 12 10:22 S.gpg-agent.browser=
srwx------ 1 root  root     0 feb 12 10:22 S.gpg-agent.extra=
srwx------ 1 root  root     0 feb 12 10:22 S.gpg-agent.ssh=
-rw-r----- 1 zap2x zap2x  676 feb 12 10:46 sshcontrol
-rw------- 1 zap2x zap2x 1360 feb 12 10:56 trustdb.gpg

Thanks again.