Try these solutions:
1. Restart the mower
Turn the mower off and then back on to restart it.
2. Restart the reference station
Unplug the reference station, wait a moment, and then plug it back in.
3. Pair the mower with the reference station
In the Automower® Connect app, pair the mower with the reference station. Go to My mowers > select your mower > Select EPOS® setup and follow the instructions to establish the connection.
Check the step-guide for more details.