There could be several reasons why Jurassic World Alive closed unexpectedly. Here are suggestions that will usually solve issues like crashing or freezing.
1. Try rebooting your device. 2. Do not run any other applications in the background while using Jurassic World Alive. 3. Select your device settings > WiFi, and then tap your network to forget it. Then reconnect to your WiFi network. 4. Try uninstalling and reinstalling the App. If you are playing as a Guest DO NOT uninstall your game. 5. Try upgrading the operating system on your device to the latest one.
If these do not help, please write us an e-mail with your support key and as many details as possible.