Trying to determine why a web page is marked as malicious with no threat

I am using the Avira Secure Browser, and it is triggering this web site as malicious, but then has no detected threat.  I am the InfoSec and ITOps manager for that domain, and we have scanned our site with multiple systems and we don't know what it is that Avira is detecting.  

Does anyone know how to get the Secure Browser what it's detecting, how to contact Avira to tell us what they're detecting, and/or how to contact Avira to remove this detection as a false positive?