Test your SSL's configuration
The process of getting an SSL issued and installed can be complicated, but there are tools available to help you get through it.
After you generate a certificate signing request (CSR), you can paste it into CSR decoder to make sure you have the correct common name and organization listed in the CSR from your server. If the information shown on the CSR decoder isn't correct, you can repeat the process of generating a CSR with the correct common name and organization.
Note: If the CSR you are using is for a wildcard certificate, the CSR must include the asterisk for the sub-domain level you wish to cover on the common name. Example: To secure test.coolexample.com and www.coolexample.com, the common name on your CSR needs to be *.coolexample.com
After you have installed your SSL certificate, you can use the certificate checker to view the details on your certificate and check for a variety of common SSL issues. Most issues that come up on the certificate checker can be solved by rekeying your certificate and installing it again.