Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. crt.sh | example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.
Server errors checking /, a redirect checking /.well-known/acme-challenge/random-filename, there
Service Unavailable Service Unavailable - DNS failure The server is temporarily unable to service your request. Please try again later. Reference #11.a47a7b5c.1615539797.76b543e
Your client is buggy / expored
Your domain isn't configured / configuration is wrong
The error isn't a Letsencrypt error, it's an error of your client.
It looks like you have a working GoDaddy certificate right now. If you're trying to switch to a Let's Encrypt certificate on the Akamai CDN using Akamai tools, I think you'll have to ask Akamai for help figuring out the problem, as that situation is probably very Akamai-specific. (If they can't figure it out, they're also welcome to come here and share more technical information to try to hash it out.)