Q:

cURL error 60: Peer’s Certificate issuer is not recognized

I have a store build in wordpres which offers wordpress templates and it has an updater system.
My server is centos 6.9 and Im using virtualmin.
Comodo SSL and php7 but the people when try to update their themes they get the messagge Download faild.cURL error 60: Peer’s Certificate issuer is not recognized. 
Sorry Im not an expert with servers but Im very confused with this issue if any one know a solution any help would be very appreciated.Thankyou.
Also after moving my domain to ssl I see that Im going down in google ranking to, maybe because of this problem?

A:

Looks like you have problem with root and intermediate certificate. If you add only one SSL Certificate, there could be some SSL errors. You could check your site by SSL Cheker and if problem exist, fix it by adding required certificates.

