SSH Filestore fails if you use ECDSA keys

I have set up a backup job that uses an SSH filestore for the backup.  It was previously working fine with RSA keys.  I upgraded my file server to Ubuntu 22.04, which rejects RSA keys by default, so I updated the SSH keys on my FreePBX machine to ECDSA.

With the SSH filestore using ECDSA keys, it will fail to login to the remote SSH server.  Same server works fine if I switch it back to use RSA keys. 

I can manually SFTP to my server using the ECDSA keys from the command line when logged into the asterisk account.