1. Make sure you have an online profile* for OD before beginning the steps, and that its status says "Connected, synced." (See below.) This is a critical step!!
2. Go into the device's Application Manager.
3. Scroll and find Anki OVERDRIVE and select it.
4. Use the Clear cache button, then Clear data button to clear both.
5. Use the uninstall button to uninstall Anki OVERDRIVE
6. Go to Google Play Store and re-download and install Anki OVERDRIVE.
*To preserve your data first:
1. Launch the Overdrive app, then tap your avatar image (upper left corner of the home screen).
2. If you see a "Sign up / Login" button, tap it then follow the on-screen instructions.
3. Once your status shows "Connected / Synced", you can proceed with the instructions above.
Our sincere apologies for this issue! If you need additional support or have questions, please contact Customer Care: support.anki.com
Thank you to everyone who hopped on this thread!