No GPS recorded at all on today's run. Nothing different to previous runs on same route. Any help please?

Hi, I went running this morning and started the Run Activity as usual.  But when I got back and uploaded to strava there wasn't a map.  I can't find a map on Garmin Connect either (but I don't know where to look so I might be looking in the wrong place).  I've had maps for all my runs and bike rides this week just this one is missing the map. I haven't done anything different but I did turn the watch off last night to save the battery.  It's a Fenix 5x.  Many thanks.