permission denied (publickey) using git from DigitalOcean console, Forge user

My setup originates with Laravel Forge connecting to various GitHub repos. I’ve been running a dozen sites without issue for about 6 months. All of a sudden, yesterday I started getting this permission denied (publickey) error in the DigitalOcean Console when I run any git push or git pull command.

I’ve been through these articles:

• https://www.digitalocean.com/community/questions/error-permission-denied-publickey-when-i-try-to-ssh
• https://www.digitalocean.com/community/questions/ssh-permission-denied-publickey
• https://stackoverflow.com/questions/48713210/ssh-permission-denied-publickey-digitalocean-ubuntu

They all recommend roughly the same solution:

1. Edit config file sudo nano /etc/ssh/sshd_config
2. Change PasswordAuthentication yes which I shouldn’t need to do since this is SSH, not password auth
3. Change PublickeyAuthentication yes or in my case, uncomment it
4. One article says to change AuthorizedHostKeys .ssh/authorized_keys
5. Save, exit, and then run sudo service sshd reload

I’ve tried all these steps multiple times but I still can’t get reconnected to my git repositories.

I’ve also reviewed the Forge SSH Keys instructions and confirmed the server key provided is the correct server key in /home/forge/.ssh/authorized_keys

Any additional ideas for 2020? I’m running Ubuntu 18.04.3