If I try to access https beastkeeper dot com, it tells me such a connection cannot be trusted. Is it just a formality, such as a certificate renewal failure, or is there something else wrong?

In the bug forum someone asked the same question, and Angel said they don't use https.

Here's a screenshot of the digital certificate that seems to indicate that they do:

Poe, are you using a mobile device? The user who submitted the bug also reported it occurring when using a tablet. I get the warning when using my own tablet, but not on my phone or laptop. 

I don't know a thing about SSL, but I think it's okay to trust the certificate, as my system does so by default. Or, just delete the "s" in the "https" part of the URL.

I use laptop only. No phones, or tablets. Multiple devices can have different web browsers with different settings, and so handle the content differently. I might try different web browsers if I feel adventurous.

Ad: After a quick test of three different browsers, one of them was able to reach https beastkeeper trouble-free. I have only tried to reach the main page, though.