Please note that the latest software update was Android 8.1 Oreo. Kindly note that the release date of software updates differ between countries and devices, our engineers are constantly working on new updates, once the update is released you will receive it automatically.
Kindly try to clear the cache of the apps that are not working:
Open Settings, and then swipe to and tap Apps. Select or search for the app you want to clear. Tap Storage, and then tap Clear cache.