I think I hit a break thru.  I went ahead and installed AEM 5.6.1 Service Pack 2, restarted my server, did a promote launch and saw a success message.  It redirected me to the production page with my changes.  I am going to continue to test to make sure it wasn't a fluke but I'm thinking the service...

I downloaded and install the hotfix and tried promote launch but still same errors.  So I restarted my server tried again and still same errors.     I saw adobe has a AEM 5.6.1 Service Pack 2 available (https://www.adobeaemcloud.com/content/marketplace/marketplaceProxy.html?packagePath=/content/com...

No I have not installed any hot fixes or service packages.  I tried to install the one you suggested but I get a message saying "There are no clouds available to install this package".  

My thoughts are we have the Promote Launch configured incorrectly.  I'm attaching screenshots of our setup.

Okay, so we have a bit of a user error.  I had been reading the wrong error.log.  However, when I read the correct error.log file I see a lot of stuff including lots of ERRORS.  However, I can't decipher what the root cause is.  Please see attached file.   I only copied the ERRORS that seemed releva...

Thank you kunal23.  This is a little out of my element so I'll need a little instruction on how to add a debug logger for package "com.adobe.cq.wcm.launches".  I'm assuming it's a configuration change in http://localhost:4502/system/console/configMgr/?  

I created a launch of our homepage and made my edits.  When I go to Promote Launch from sidekick I get an error message "Launch could not be promoted".  Then if I refresh the page my edits get overwritten by the production page.  I do not see anything showing in my error logs or any of my logs relat...