ssh.ParsePrivateKey: ssh: no key found

Im getting this error:
`2021/11/12 09:59:53 ssh.ParsePrivateKey: ssh: no key found
2021/11/12 09:59:54 error copy file to dest: ***, error message: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none], no supported methods remain
drone-scp error: error copy file to dest: ***, error message: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none], no supported methods remain`

And my code looks like:
`- name: copy file via ssh key
uses: appleboy/scp-action@v0.1.2
with:
host: ${{ secrets.HOST }}
username: ${{ secrets.USERNAME }}
key: ${{ secrets.KEY }}
source: "${{ secrets.SOURCE}}"
target: ${{ secrets.TARGET }}`

Any tips how to fix it?

Start with the scp-action v0.1.2 workflow configuration and the ParsePrivateKey and handshake errors shown in the issue. Reproduce the copy using the supplied host, username, key, source, and target inputs; done means the action authenticates and copies the requested file without these errors.

Written by the indexing model from the issue text.