Can't install packs

Hey, today I just remembered a game called pump it up and really wanted to play the songs from that game again. So I went onto the etterna site to search for a pack that got the songs and for some reason it says that my connection is not private whenever I try to install it. This problem is frequent throughout all song downloads, and my browser just doesn’t let me install the packs. Will this ever get fixed?

I use chrome and for me it shows the message, then I click the advanced button and click proceed anyway and it works

Just realized I can do the same with my browser with no problem, thanks!