Hi, double check that the activities visibility is set correctly (not to “only you”), and that they aren't muted - go to the edit mode and look at this part:
 

As of today, no one can see my activities in their feed.  I did not change any parameters and checked all the privacy settings.  I tried reloading the activity and it still did not function properly.  Any ideas?

Hi ​@959golfer, it looks like the following issue on Strava's side has resurfaced today, check the following thread - scroll down to see today's comments: