PSE 14 Photomerge Panorama Problems

I'm using PSE 14 on a MacBook Pro running MAC OS High Sierra 10.13.4. I am having trouble getting the Photomerge Panorama to work. When I try to merge the files a get an error message:

Error 48: File or folder does not exist.

Line: 39

->  $.evalFile(g_StackScriptFolderPath + "StackSupport.jsx");

I've tried increasing the available memory as well as resetting preferences to no avail.  Does anyone have a fix?

Dick