This article is for Android devices. If you're using iOS, visit this guide.
If the app finds your device but fails to connect to it with this error, you're most likely experiencing Bluetooth Pairing Issues.
What to do?
First: Reset the Fieldy device
Be careful, this will erase your Offline Storage.
Hold the Fieldy button for 10 seconds until 4 different colors blink.
Then: Force Stop the App
Go to Phone settings
Find "Apps", press on it
Find "Fieldy" in the app list, press on it
Press "Force stop"
Video available here: Open Video (Samsung)
Finally: Connect and Pair
Now try to connect the device again. You should be prompted with a new Pairing request. Press "Pair".