Error with my Django Heroku App

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My domain is: www.trickcombo.com

I ran this command: certbot certonly --standalone

It produced this output:

Domain: www.trickcombo.com
Type: unauthorized
Detail: Invalid response from
http://www.trickcombo.com/.well-known/acme-challenge/um-TdJnXZ1HmB8AupU7bY25-cukUpqWLmYf_G-0CQsw
[54.85.41.146]:

My web server is (include version): Heroku

The operating system my web server runs on is (include version): Heroku

My hosting provider, if applicable, is: Heroku

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

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

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot): 1.11.0

Don't know if this is the issue, but I'm using Google Domains and I'm not sure if I've set up my DNS correctly. Here's what I've done:

A synthetic record with subdomain @.trickcombo.com -> www.trickcombo.com, Temporary redirect, Do not forward path, Disable SSL

A custom resource record with Name: www, Type: CNAME, TTL: 1hr, Data: DNS Target from heroku

Note: I'm using the free tier in Heroku, so I can't use their SSL service.

Hi @justinwon777

your setup can't work.

If you use Heroku via CNAME, you must run the standalone certbot there

but you can't.

You can use --manual and dns validation, but without an API, that's painful.

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