@Terry.G linked you to the re-installation instructions which I’d also advise you try in their entirety. Especially the part about saving your personal best and customer workout files.
These Z error codes can happen because files were corrupted during the download of the game app. It’s therefore important to delete everything Zwift-related in those re-installation instructions.
Once those suspect corrupted files are deleted and a clean install package from Download Zwift on iOS, MAC, PC, or Android Devices | Zwift is on you hard drive - the installer apps should be able to proceed smoothly. Would you let us know if that helped?