Acrobat needs to be reinstalled to solve this issue. I had to call Adobe to reinstall. When I try to reinstall I get error 136. Once installation is complete issue is fixed.

This is the second time this has happened.
I have scripts that I reuse in JavaScript Editors for example Properties/Format/Custom/Custom keystroke script. When I try to paste the script nothing happen. It is fixed now as I reinstalled acrobat. Last time it worked for a month or so. Will see what happens this time. Hope it doesn't happen again.