Kodi 17.5 APK not working on android and Firestick TV has been reported by many users. The app would simply crash at initial startup.
The Kodi team immediately works pushing a the latest update to fix this unexpected behavior on Kodi 17.5. The update only available on android because this issue only impacted on android devices.
Since Firestick TV is Android based device and uses the same Kodi app for android, the new version will also applicable for your Firestick TV and other Android TV BOX.
Fix Kodi 17.5 Not Working on Android and Firestick TV
To fix Kodi 17.5 not working on Android and Firestick TV you have to install the latest Kodi 17.5.1 Krypton APK. The app crash at initial start will no longer found in this latest version.
You can download Kodi 17.5.1 APK for your Android devices from this Kodi Download Page
For step by step installing the latest update Kodi 17.5.1 for Firestick TV read Guide install Kodi 17.5.1 for Firestick TV