Hello ... I can log on to Optik TV from my Mac Mini using Safari. When trying access the CTV Calgary Station 101 and CTV News Network 801 ... I get the subject message. When I select "Dismiss" it takes me back to a screen where I can select that station again. When I select again, I get the same message.
Is your Mac Mini connected to anything else - specifically Quicktime or Remote Desktop? From what I can see - the error is related to 'capturing' encrypted video. I'd try disconnecting any capturing mechanisms, logging out, clearing your cache and logging back in.