Games that won't install after you buy them can definitely be worrisome, so let's see what we can do to help out! If it won't install from your library, try opening up the game in the store, to see if you can prompt it to download that way. Make sure your headset has enough space to download and unpack the game files. Typically, it's best to have double the space of the game available. If the game is 3gb, make sure you have 6gb, for example.
If that doesn't work, we recommend restarting your router, and reconnecting your Wi-Fi in the headset after it reboots. If it still shoots back the install failed error, you may need to factory reset the headset, which will wipe it back to default settings. You'll need to re-setup the headset via the mobile app, and all of your games/apps will be available for re-install after signing in again. If you do end up needing to factory reset, be sure to backup your save files to the Oculus Cloud using the Cloud Backup feature.
Still no dice? Please reach out to us on our support channel to open up a ticket, and we'll get back to you to help troubleshoot more as soon as possible!