Here’s the message I got:
Fatal error: Uncaught exception 'Exception' with message '401 <error xmlns="api-v1.myspace.com"><statuscode>401</statuscode><statusdescription>User has not installed the current application or application does not have access to requested resource</statusdescription></error>' in /BaseAPI.php:62 Stack trace: #0
The problem was that MS_API_KEY changed, so just update it with the new “OAuth Consumer Key:” on the myspace dev app page and you’re done.