I am running WordPress 3.8.1 on NGINX 1.4.4. Until recently, I was using Apache 2.4. Since changing, the SyntaxHighlighter Evolved (version 0.7.8.4) popup box that appears when clicking the 'pre' or 'code' TinyMCE button in the Visual Editor, is empty and unresponsive. The box appears, but the usual data entry fields and drop-down box to select which language to use are missing; it's just a blank white screen. There are no relevant entries in either NGINX error or access logs. I am using the same browser, without any changed settings, as when running WordPress on Apache. In fact, everything is the same except for the HTTP daemon and SSL protocols.
Surely I am not the only WordPress on NGINX user who has experienced this problem. How do I fix it?