Provisioning a certificate for the domain failed

Email subject: TLS certificate renewal was unsuccessful

I received an email from Fly.io saying they tried to provision a certificate for me but receive an error message:

“An IPv6 address pointed at us is required.”

This is something that has been working for months now so not sure why I need a renewal.

I did some looking around and seeing messages about removing and re-adding a certificate (which did not work for me), and disable Cloudflare proxying (which did not work for me).

Also, do I need to be worried if I see an error on my certificate screen:

" Error when resolving hostname `_acme-challenge…"

I admit I’m not the most familiar with this stuff so I need some help.

Thanks.

I received the email May 26th. But there is definitely something wrong with my app. It’s not accessible as it was before. So, it seems like a legit email for me anyways.

Small side note: I’ve moved my earlier mention of all the false-alarm messages on May 26 down here, since your retroactive edit unintentionally broke the logical flow of the thread…

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I was able to renew my certificate by following steps outlined on this page. It worked for me! Specifically, steps 3-7 since I already had an existing app.