Here's a brief summary of the issues we know about SSL certificates in the pending state.
Am I affected by this?
If your dashboard looks like this for more than 12 hours, there could be a problem during issuing your certificate.
There exist some countries where we cannot issue an SSL certificate due to legal reasons.
Certain brand names (like Microsoft for example) are blocked during certificate issuing.
There can be many other reasons for your certificate being in Pending Validation. Please check out the article for further information.