Why can't I PUSH from SublimeText3?

Question

linux

in sublime text 3 installed the git plugin. can't push changes.

[email protected]: Permission denied (publickey).
    fatal: Не удалось прочитать из внешнего репозитория.
    Удостоверьтесь, что у вас есть необходимые права доступа и репозиторий существует.

ssh is used and from the console everything is normally pushed.

git push origin dev
Everything up-to-date

the owner of the project folder is my user, the rights are 755.
everything works fine on my home PC (os win7).
what is the problem? OS kubuntu 18.04

Answer 1

ran st3 and pushed as root, and root doesn't have an ssh key.

Answer 2

Have you got your certificates?

Answer 3

Try writing in the console:
ssh-add /путь/до/сертификата/*.pem