Certificate verification error after installing certbot when trying to update.

After running Certbot on my Ubuntu VPS, I began receiving this error when running apt update:

Hit:1 http://security.ubuntu.com/ubuntu jammy-security InRelease
Hit:2 http://mirrors.digitalocean.com/ubuntu jammy InRelease
Hit:3 http://mirrors.digitalocean.com/ubuntu jammy-updates InRelease
Ign:4 https://repos.insights.digitalocean.com/apt/do-agent main InRelease
Hit:5 http://mirrors.digitalocean.com/ubuntu jammy-backports InRelease
Hit:6 https://repos-droplet.digitalocean.com/apt/droplet-agent main InRelease
Ign:4 https://repos.insights.digitalocean.com/apt/do-agent main InRelease
Ign:4 https://repos.insights.digitalocean.com/apt/do-agent main InRelease
Err:4 https://repos.insights.digitalocean.com/apt/do-agent main InRelease
  Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate.  Could not handshake: Error in the certificate verification. [IP: 205.185.216.10 443]
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
14 packages can be upgraded. Run 'apt list --upgradable' to see them.
W: Failed to fetch https://repos.insights.digitalocean.com/apt/do-agent/dists/main/InRelease  Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate.  Could not handshake: Error in the certificate verification. [IP: 205.185.216.10 443]
W: Some index files failed to download. They have been ignored, or old ones used instead.

The closest I could find to this problem being talked about on here is this post from August: https://www.digitalocean.com/community/questions/how-to-get-rid-of-server-certificate-verification-failed.