Unsupported protocol error only in Slimjet

[Joel]

There's a website that I can't view in Slimjet because of an unsupported protocol error, per the screenshot below.
Is there a setting I need to change to make it show up?

[Anonymosity]

You are right. That page does not work with Slimjet, but does with Safari, Vivaldi, Pale Moon and SeaMonkey. Maybe Slimjet is not up to date on its encryption protocols?

[Joel]

You are right. That page does not work with Slimjet, but does with Safari, Vivaldi, Pale Moon and SeaMonkey. Maybe Slimjet is not up to date on its encryption protocols?

I also just discovered that it doesn't work in Chrome, either. All other browsers are fine.