Installation Failing on Acrobat XI Pro Mac

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Need to be off!

I installed Acrobat XI.  when I go to run Adobe Application Manager, I receive Error Code A12E1

Can you tell me why I am receiving this error?

Moving to Installing, Updating, & Subscribing to Acrobat​

For Mac El Capitan or the newer Sierra operating system read below

-CS6 and earlier programs have not been tested and will not be updated for Mac El Capitan/Sierra

-which means that you try to use CS6 and earlier at YOUR risk of having problems

-you may get CS6 and earlier programs to install and run, or you may not (some do, some don't)

-Java https://helpx.adobe.com/dreamweaver/kb/dreamweaver-java-se-6-runtime.html may help

-https://helpx.adobe.com/creative-cloud/kb/install-creative-suite-mac-os-sierra.html

-Mac Sierra problems https://forums.adobe.com/thread/2211696

-Premiere Pro and Sierra https://forums.adobe.com/thread/2211815

-https://blog.conradchavez.com/2016/06/16/macos-10-12-sierra-will-adobe-software-work/

Install CS5 on Mac 10.11 https://forums.adobe.com/thread/2003455 may help (also for other than CS5)

-also a TEMPORARY security change https://forums.adobe.com/thread/2039319

-http://mac-how-to.wonderhowto.com/how-to/open-third-party-apps-from-unidentified-developers-mac-os-x-0158095/

-and more on gatekeeper https://support.apple.com/en-au/HT202491