Please help my website is showing above error and I am unable to open my website. My website name is hileatherstore.com. but it's showing error massage 'your connection is not private. How can I fix that??
Welcome to the Let's Encrypt Community 
Your certificate is expired. You just need to renew it.
How did you get it the first time?
Hi @Umang
checking your domain via hileatherstore.com - Make your website better - DNS, redirects, mixed content, certificates - that looks curious.
You use one certificate with two domain names:
CN=hileatherstore.com
31.10.2020
29.01.2021
1 days expired *.hileatherstore.com, hileatherstore.com - 2 entries
the main domain and the wildcard version.
So two TXT entries _acme-challenge.hileatherstore.com with the same domain name, but different values are required.
But checking your TXT (see the #txt part)
14. TXT - Entries
| Domainname | TXT Entry | Status | ∑ Queries | ∑ Timeout |
|---|---|---|---|---|
| hileatherstore.com | v=spf1 include:_spf.1stdomains.co.nz ~all | ok | 1 | 0 |
| www.hileatherstore.com | v=spf1 include:_spf.1stdomains.co.nz ~all | ok | 1 | 0 |
| _acme-challenge.hileatherstore.com | fcIyFmFzEMKceQkqCE36WnvPpZpholkqjWDoninTl58 | looks good, correct length, correct characters | 1 | 0 |
| _acme-challenge.www.hileatherstore.com | Name Error - The domain name does not exist | 1 | 0 | |
| _acme-challenge.hileatherstore.com.hileatherstore.com | Name Error - The domain name does not exist | 1 | 0 | |
| _acme-challenge.www.hileatherstore.com.hileatherstore.com | Name Error - The domain name does not exist | 1 | 0 | |
| _acme-challenge.www.hileatherstore.com.www.hileatherstore.com | Name Error - The domain name does not exist | 1 | 0 |
there is only one entry with that domain name visible.
Looks like you have used a manual method, added one value, then updated that value instead of creating a second entry.
So the validation failed.