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.
My domain is: www.growthmindsetnetwork.com
I don't know how to log in so that I can rebuy it ... I have 6 days to find out it... receive this email:
Your certificate (or certificates) for the names listed below will expire in 8 days (on 20 Aug 22 08:16 +0000). Please make sure to renew your certificate before then, or visitors to your web site will encounter errors.
I'm not sure what you mean by "how to log in" or "rebuy it", because Let's Encrypt certificates are free of any charge. (Although hosting providers can/are allowed to charge for offering a service which uses Let's Encrypt..)
As @MikeMcQ already said, the domain is up for grasps by anyone willing to pay registration fees at any random DNS registar, so my guess is your primary issue is at your hosting provider, assuming your hosting provider also dealt with the DNS registration.
That said, Let's Encrypt is not a hosting provider, so unfortunately we cannot help you with that. The hosting provider is the company which you've paid to have your site hosted in the first place.
@suzan_yumerova in the current Internet naming model, you need to buy your domain name (using a domain registrar), and pay for yearly renewals for that name via your registrar. This may be a separate company from your web hosting, or it may be the same company in some cases. But it's a necessary first step and it looks like that's missing (it looks like the ownership of your domain has lapsed completely).