ssh-add private key error loading key invalid format

[kevinbull]

I use the ssh-keygen-lite lib to generate the key pair like this:

const sshkeys = await keygen(
                {
                  location: path.join(require('os').tmpdir(), `id_${process}_rsa`),
                  type: 'rsa',
                  read: true,
                  force: true,
                  destroy: true,
                  comment: `${process}@some.domain`,
                  password: '',
                  size: '2048',
                  format: 'RFC4716'
                }
              )

Then I get the private key:

const private = sshkeys.key

Finally, the private key is written to a file where upon trying to add it to the ssh-agent using ssh-add it just says Error loading key "id_processname_rsa": invalid format.

The key appears to be fine to me but I guess I don't know what to look for. This is the format of the key:

-----BEGIN OPENSSH PRIVATE KEY-----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-----END OPENSSH PRIVATE KEY-----

Is there something obviously being done wrong? How do I find out what is wrong with the format?

Thanks for any help or direction!