League Screensaver

I absolutely love the League Screensaver, I love having the alternating animated images for my screensaver. Recently, I have just updated my computer ( I own a Mac, ugh I know) to macOS Sierra, and now the Screensaver app is is not functioning. Either it players the demo picked images or its a black screen stating that the screensaver is usable with my version of my computer(image above). Im just wondering if I'm the only one with this problem, and if there is anyway to fix it. (Other then removing and re downloading the the app, since that doesn't work) Thanks!