Sadly I can't use it too. When I try to access your faucet I see the same message above, but I can skip it and claim the reward, the problem is that when I complete short-link and it redirect me to the faucet I can't open it anymore, even skiping the warning message it redirect me to the same message in looping.
Some time ago DwarvenBitMine was showing this same message of warning and that is what the site owner said about:
No, there is no risk. It shows you this information because I am currently using a self signed certificate and your browser thinks it might be risky. I am going to replace the cert which has also a CA.
Maybe a similiar situation?