Sourcetree & githup over ssh problem

[ashindarev]

A've got macos Catalina. Today i've install last update (but i'm not sure that it's a cause).

So, my config is:

1) project on github cloned over git@github.com:...

2) i'm able to push & fetch by git 2.23.0

3) i'm able to push/fetch in sourcetree over https

3) i'm unable to push/fetch in sourcetree over git@ (ssh): 

-------

git --no-optional-locks -c color.branch=false -c color.diff=false -c color.status=false -c diff.mnemonicprefix=false -c core.quotepath=false -c credential.helper=sourcetree fetch origin

git@github.com: Permission denied (publickey).

fatal: Could not read from remote repository.

Please make sure you have the correct access rights

and the repository exists.

git@github.com: Permission denied (publickey).

fatal: Could not read from remote repository.

Please make sure you have the correct access rights

and the repository exists.

git@github.com: Permission denied (publickey).

fatal: Could not read from remote repository.

Please make sure you have the correct access rights

and the repository exists.

git@github.com: Permission denied (publickey).

fatal: Could not read from remote repository.

Please make sure you have the correct access rights

and the repository exists.

Completed with errors, see above

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Anibody knows where to dig?

P.S.> yesterday all was OK...