SSL Certificate Auto-Renew Failed

I've been running this Django site built on AWS Lightsail for over a year with zero problems. I used the bncert-tool to create an automatically-updating SSL certificate. The certificate had been renewing fine every 30 days, and I have not touched anything in the server for months because there was no need to. However, I received an email telling me the certificate was about to expire -- I checked the /var/mail/ to find some errors from my cron job (detailed below).

I have no idea what happened/changed, and I don't know how to fix this! Can anyone please help?

My domain is:

I have a cron job scheduled running this command for renewal:
sudo /opt/bitnami/letsencrypt/lego --path /opt/bitnami/letsencrypt --email="MY-EMAIL" --http --http-timeout 30 --http.webroot /opt/bitnami/apps/letsencrypt renew && sudo /opt/bitnami/apache/bin/httpd -f /opt/bitnami/apache/conf/httpd.conf -k graceful # bncert-autorenew

It produced this output:
unable to get authorization for:
one or more domains had a problem:
failed to post JWS message: failed to sign content: failed to sign content: square/go-jose: Error generating nonce:
failed to get nonce from HTTP HEAD: 503 ::HEAD :: :: unexpected end of JSON input ::

My web server is (include version): Bitnami on apache/2.4.46 (Unix)

My hosting provider, if applicable, is: AWS Lightsail

I can login to a root shell on my machine (yes or no, or I don't know): yes

I'm using a control panel to manage my site (no, or provide the name and version of the control panel): no

Closing question -- switching to manual renewal fixed the issue (believe I needed to update bncert-tool)