JS errors in local installation

Hi All,

I've just upgraded my local Sugar instance (on vagrant VM) from 8.2 to 8.3. I'm now seeing JS errors when I open the Scheduler list view in Admin, as shown in the image below.

When I click on a scheduled job record, it opens with a new set of errors:

When I click on Edit, the edit view does not open, and a new error gets appended to the list:

TypeError: SUGAR.ajaxUI is undefined

I tried Quick Rebuild and Repair, and I tried "Rebuild .htaccess file", but it has no effect on the errors. 

What else can I try to fix this?