App Revision

I had an app created that is working fine but there are some minor issue I would like to be ironed out. The navigating through the buttons and selecting items are a bit clunky and the app doesn't seem to work at all with certain devices. The app has no problem on phones, it works on Chromecast with google TV, it works on the 4K version of the firestick but it does not work on earlier versions of the firestick ( there is a parsing error) I also need to getting working on Roku. Contact me for login credentials, you must at least have a TV device to test on. Most elements of the app is able to be edited in Wix.