The error needs to be resolved by the site host, not by the card issuer. The troubleshooting FAQ post I linked to above describes the SSL issue in detail.
I tested this using this command:
echo -e "HEAD / HTTP/1.0\r\nHost: writersboon.com\r\n\r\n" | openssl s_client -servername writersboon.com -connect writersboon.com:443 -state -quiet
Result:
SSL_connect:before/connect initialization
SSL_connect:SSLv2/v3 write client hello A
SSL_connect:SSLv3 read server hello A
depth=0 OU = Domain Control Validated, OU = EssentialSSL, CN = writersboon.com
verify error:num=20:unable to get local issuer certificate
verify return:1
depth=0 OU = Domain Control Validated, OU = EssentialSSL, CN = writersboon.com
verify error:num=21:unable to verify the first certificate
verify return:1
SSL_connect:SSLv3 read server certificate A
SSL_connect:SSLv3 read server key exchange A
SSL_connect:SSLv3 read server done A
SSL_connect:SSLv3 write client key exchange A
SSL_connect:SSLv3 write change cipher spec A
SSL_connect:SSLv3 write finished A
SSL_connect:SSLv3 flush data
SSL_connect:SSLv3 read server session ticket A
SSL_connect:SSLv3 read finished A
HTTP/1.1 301 Moved Permanently
Date: Mon, 04 Sep 2017 08:42:37 GMT
Server: Apache/2.2.15 (Oracle)
Location: https://writersboon.com/ords/f?p=WB:HOME:0:::::
Vary: Accept-Encoding
Connection: close
Content-Type: text/html; charset=iso-8859-1
SSL3 alert read:warning:close notify
SSL3 alert write:warning:close notify
From the FAQ post:
- if you see a validator message about
Fetching the page failed because other errors or similar, check your SSL configuration. The certificate and server name must match (or be aliased to match) due to Java security constraints. More in this thread.