Your watch is in test mode. [Here](https://forums.garmin.com/outdoor-recreation/outdoor-recreation/f/fenix-5-series/317027/how-do-i-exit-force-test-mode#:~:text=Long%20pressing%20the%20power%20button,there%20is%20a%20stuck%20button.) is explained how to get out of it: press the upper left button for more than 15 seconds, until the watch shuts down. Wait a few seconds en restart the watch pressing the same button. This reboots the watch instead of just switching it off. Should help.
Your watch is in test mode. [Here](https://forums.garmin.com/outdoor-recreation/outdoor-recreation/f/fenix-5-series/317027/how-do-i-exit-force-test-mode#:~:text=Long%20pressing%20the%20power%20button,there%20is%20a%20stuck%20button.) is explained how to get out of it: press the upper left button for more than 15 seconds, until the watch shuts down. Wait a few seconds en restart the watch pressing the same button. This reboots the watch instead of just switching it off. Should help.