Consti

That looks like a loading indicator of your client, especially if the gradient of the box is moving

Click on the release (green thingy after description) and download apk

The good ones are 30 years old. The one they needed to fix is the sony one, which was not specified how old but “modern” implies not very.

The certificate of example.com refreshed just a few hours ago, if verification fails on your system check your clock (do time and timezone match?)