# SSL Certificate SEC\_ERROR\_UNKNOWN\_ISSUER
**URL:** https://forum.infinityfree.com/t/ssl-certificate-sec-error-unknown-issuer/51002
**Category:** Hosting Support
**Created:** [September 8, 2021, 7:08am UTC](https://forum.infinityfree.com/t/ssl-certificate-sec-error-unknown-issuer/51002 "2021-09-08T07:08:32Z")
**Posts on this page:** 11
**Page:** 1
### Author:  [@anon54440053](https://forum.infinityfree.com/u/anon54440053)
#### Post date: [September 8, 2021, 7:08am UTC](https://forum.infinityfree.com/t/ssl-certificate-sec-error-unknown-issuer/51002/1 "2021-09-08T07:08:33Z")
Just started my first site project with Infinityfree subdomain and I install (Wordpress) SSL/HTTPS certificate (GoGetSSL) by following these instructions [https://www.youtube.com/watch?v=DVxXcI6Qako](https://www.youtube.com/watch?v=DVxXcI6Qako)
After testing https site to different browsers, with Opera everything is fine, but Mozilla Firefox blocks site and says “The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported. SEC\_ERROR\_UNKNOWN\_ISSUER”
[SSL Checker](http://sslshopper.com/ssl-checker.html) says “The certificate is not trusted in all web browsers. You may need to install an Intermediate/chain certificate to link it to a trusted root certificate. Learn more about this error. The fastest way to fix this problem is to contact your SSL provider.”
Any ideas how to fix this?
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### Author:  [@jaikrishna.t](https://forum.infinityfree.com/u/jaikrishna.t)
#### Post date: [September 8, 2021, 7:20am UTC](https://forum.infinityfree.com/t/ssl-certificate-sec-error-unknown-issuer/51002/2 "2021-09-08T07:20:45Z")
> [@anon54440053](#):
>
> SSL/HTTPS certificate (GoGetSSL)
Are you using a custom domain or subdomain? Can you share the website URL?
Yes, it is true, In free hosting, we cannot install intermediate/Chain certificates. Most browsers accept the certificate. This might help:
> [@SSL checker shows "certificate not trusted" warning](https://forum.infinityfree.com/t/warning-the-certificate-is-not-trusted-in-all-web-browsers/49697):
>
> When you check your InfinityFree SSL certificate with online SSL checker tools, you might see a warning like this: The certificate is not trusted in all web browsers. You may need to install an Intermediate/chain certificate to link it to a trusted root certificate. This warning sounds scary, but it’s actually not a problem for your website visitors. What this warning means for your site You can safely ignore this warning. Your site will work perfectly fine with HTTPS for virtually all mode…
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### Author:  [@anon54440053](https://forum.infinityfree.com/u/anon54440053)
#### Post date: [September 8, 2021, 8:00am UTC](https://forum.infinityfree.com/t/ssl-certificate-sec-error-unknown-issuer/51002/3 "2021-09-08T08:00:36Z")
Ok, if I understand correctly, (GoGetSSL) SSL/HTTPS certificate is not supported by some browsers like Mozilla, Safari and I can only use HTTP?
And with Infinityfree subdomain and free hosting, that can’t be fixed?
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### Author:  [@jaikrishna.t](https://forum.infinityfree.com/u/jaikrishna.t)
#### Post date: [September 8, 2021, 8:03am UTC](https://forum.infinityfree.com/t/ssl-certificate-sec-error-unknown-issuer/51002/4 "2021-09-08T08:03:48Z")
Based on the above image you can understand the differences. With this make your choice
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### Author:  [@wackyblackie](https://forum.infinityfree.com/u/wackyblackie)
#### Post date: [September 8, 2021, 11:11am UTC](https://forum.infinityfree.com/t/ssl-certificate-sec-error-unknown-issuer/51002/5 "2021-09-08T11:11:34Z")
No, I use GoGetSSL a lot and it works fine in Firefox, chrome, and Safari.
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### Author:  [@Greenreader9](https://forum.infinityfree.com/u/Greenreader9)
#### Post date: [September 8, 2021, 1:04pm UTC](https://forum.infinityfree.com/t/ssl-certificate-sec-error-unknown-issuer/51002/6 "2021-09-08T13:04:38Z")
Try clearing the browser’s cache and trying again. GoGetSSL is a good choice and should work on the browsers you mentioned.
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### Author:  [@anon54440053](https://forum.infinityfree.com/u/anon54440053)
#### Post date: [September 8, 2021, 10:05pm UTC](https://forum.infinityfree.com/t/ssl-certificate-sec-error-unknown-issuer/51002/7 "2021-09-08T22:05:28Z")
That I see when checking https site with [https://www.browserling.com/](https://www.browserling.com/) and [SSL Checker](https://www.sslshopper.com/ssl-checker.html)
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### Author:  [@wackyblackie](https://forum.infinityfree.com/u/wackyblackie)
#### Post date: [September 8, 2021, 10:31pm UTC](https://forum.infinityfree.com/t/ssl-certificate-sec-error-unknown-issuer/51002/8 "2021-09-08T22:31:24Z")
Why are you using Safari 5.1? It has not been update for YEARS!
Also, why Windows 7? It has not been updated for a while, either.
When machines do not have security updates, they might not recognise a CA/cert.
However, GoGetSSL certificates should work on Windows 7 (SP1), I have tested it.
We can’t help you very much if you do not provide a domain or username.
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### Author:  [@Greenreader9](https://forum.infinityfree.com/u/Greenreader9)
#### Post date: [September 8, 2021, 11:23pm UTC](https://forum.infinityfree.com/t/ssl-certificate-sec-error-unknown-issuer/51002/9 "2021-09-08T23:23:23Z")
Can you please provide a domain? If you don’t want to share it publically, you can PM me by clicking my profile icon.
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### Author:  [@Admin](https://forum.infinityfree.com/u/Admin)
#### Post date: [September 9, 2021, 4:20pm UTC](https://forum.infinityfree.com/t/ssl-certificate-sec-error-unknown-issuer/51002/10 "2021-09-09T16:20:35Z")
Everything is already written in this article which @jaikrishna.t already shared:
> [@SSL Certificate SEC\_ERROR\_UNKNOWN\_ISSUER](https://forum.infinityfree.com/t/ssl-certificate-sec-error-unknown-issuer/51002/2):
>
> Are you using a custom domain or subdomain? Can you share the website URL? Yes, it is true, In free hosting, we cannot install intermediate/Chain certificates. Most browsers accept the certificate. This might help:
But in short: the SSL Shopper warning is a warning that can be safely ignored. _Most_ modern browsers work just fine with it. If you are on the small percentage of devices that does not support certificates without CA chains, you have two options:
- Upgrade to [premium hosting](https://www.infinityfree.com/premium/).
- Use something like Cloudflare to handle SSL.
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### Author:  [@system](https://forum.infinityfree.com/u/system)
#### Post date: [September 16, 2021, 4:20pm UTC](https://forum.infinityfree.com/t/ssl-certificate-sec-error-unknown-issuer/51002/11 "2021-09-16T16:20:56Z")
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