I had a bid in on a pen tonight, and my snipe was well above the winning price. When I got the auction sniper report, it led me to a link with a security code that I couldn't get past.
I wrote to them and got this reply:
Currently we are not facing any issue and not receiving any similar issue. If in case you will encounter any difficulties, please feel free to contact us again.
I'm not sure I trust them completely yet. In the meantime, I did win a pen that I put a bid on with 20 minutes left and I was shocked that nobody sniped it. Now I have the answer.