This is a system error caused by the iPhone and Apple Watch versions of Endel not updating at the same time. While Apple engineers are solving it, we recommend that you reinstall the Endel app on your Apple Watch:
- Open the App Store and scroll down to the bottom.
2. Tap Account.
3. Tap Updates.
4. Click "Update" next to Endel.
If you don't use an Apple Watch and are experiencing this error, email us at firstname.lastname@example.org, and we'll look into the cause.