Website links not working despite certifications

I provide my customers with document security services for some time and recently, it came to my understanding that links to my website are not functioning properly. They are classified as malicious, even though I got all the right certificates. What might be the issue here?

I suppose the server side either doesn’t have a proper SSL certificate or out of synced Time

The only way to do this is allowing an exception to proceed load the site, usually can be found on Advanced button below the warning message.

Please follow the below link