Check your error
#13 1.286 Load key "/root/.ssh/id_rsa": invalid format
Go there and check your private key. It should have the form
-----BEGIN OPENSSH PRIVATE KEY-----
......
......
......
......
......
......
......=
-----END OPENSSH PRIVATE KEY-----
It can be that you have copied in id_rsa the content of the public key and not the private key itself.
Public key must be saved in the same folder /root/.ssh/id_rsa.pub . It must be a different file with the name id_rsa.pub
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