Connect will not allow me to Create Challenge or share Photo with Stats

As for creating a challenge - it works fine for me with the same version (through GC menu >> Challenges >> Create Challenge >> select a contact >> select type). As for a Photo with Stats - works all right for me too - brings me to the Gallery, I click the camera, make a photo, crop, click Next, and it opens all the available sharing options.

Try forcing the app to stop through Android App settings, and then starting it again. I doubt it helps, but why not trying. Make sure the app has all priviledges enabled, and that data upload is enabled in your GC Account Settings >> Privacy Settings >> Device Upload, too. You can also try uninstalling and reinstalling the CG app.

I have uninstalled and reinstalled the app (I forgot to state that in my first post).  I do have the Data Upload enabled as well.  But I will try and force stop then restart.  I have also cleared the cache from within Android settings.

Forcing the stop and restart did not work.

Strange. Does it work at least in the web interface? 
https://connect.garmin.com/modern/challenge/group-challenge/create 

Yes, it works on the web. Within the App it will let me click on a person (connection) and individually challenge them.  Then I can invite from within that challenge.  But it will not allow me to Create Challenge, then invite, then set dates, etc. from within the app.

click on a person (connection) and individually challenge them.  Then I can invite from within that challenge

That's the way I've been doing it. I was never able to start a challenge from the App, only the web.

Strange, for me it works. I mean creating a challenge through Challenges >> My Challenges >> Create Challenge >> select contacts >> select type/duration >> Start Now. I have just retried it without any problems now. Same version of GC (4.25.3), Android 9

You're right! I can click challenges on the bottom of the screen to start a challenge. 

It doesn't for me. After I select contacts, and then Next, the check beside the ones I was going to invite just disappears and continues the cycle of checking then disappearing.

I admit I tested with a single contact only. Do not want to harrass my other contacts. Does it work with just a single contact selected, for you?