There is no track for this session. That might be because your watch didn't record one, or that it lost it somehow. There was a similar Garmin bug that hit the 235 about 2 years ago. In that case it was fixed by a firmware update and/or powering off/on the watch. Maybe record a test session to see if it's still happening before your next real workout.
If there’s no track, it didn’t happen. You know the rule...