Hi, I’m having some trouble following @Shaun_DaBeast 's steps above. I’ve followed these step-by-step, except instead of using an Android tablet I’ve used my roommate’s Android OnePlus phone. I’ve logged into my Zwift account after the app was installed on his phone, viewed a ride, made note of the app version, force-quit the app, then transferred the obb folder from /Android/obb/com.zwift.zwiftgame on his phone to a USB drive.
I then found the correct APK file version on APKmirror, downloaded that and transferred that to my NVIDIA Shield into the ‘Downloads’ folder. I used a file manager app to then install the apk file. (FYI I am using a 128 GB Samsung USB drive added to my NVIDIA Shield formatted as Internal Storage on the Shield so I have additional space.) After the apk installs, I then transferred the com.zwift.zwiftgame folder’s contents from my USB drive to /Android/obb/com.zwift.zwiftgame on my NVIDIA Shield. (The /Android/obb folder didn’t exist on the NVIDIA Shield after sideloading the APK, so I had to manually create that folder.)
I then open the Zwift app by going to Settings > Apps > All Apps > Zwift. The app loading screen opens and the bottom message says “Verifying Download” and then “Unzipping Files”, but then after the progress bar completes, the screen changes to a small black rectangle over white background in the top right of the TV screen and then the app quits. (see screenshot below) When I go into my Settings > Apps on the Shield then and view the Zwift app, it shows that it’s running. I’ve tried Force Stopping the app, clearing it’s Data/Cache and re-opening it, but it continues trying to verify, unzip, and then quit out. Haven’t made it past that screen. 
Any thoughts? Has anyone else experienced this? Has anyone gotten this version of Zwift to work on the newest 16GB NVIDIA Shield Pro?
I have the latest version of NVIDIA Shield 16GB Pro model.
I have expanded the NVIDIA’s internal storage w/ a 128GB Samsung USB Drive that I permanently leave in the unit.
Zwift APK I downloaded is the latest version from Google Play store: v1.0.65416
