I am interested in using CiviRules to automate some processes within CiviCRM. I am using CiviCRM 4.6.6 and installed CiviRules 2.4. When I went to add a rule clicking Next from the first CiviRules Add Rule page I am directed to a page displaying "This page isn't working mysite is currently unable to handle this request. HTTP ERROR 500". I receive the same error page when I attempt to "cleanup the cache" and any other process I have tested. Everything returns to normal after I uninstall CiviRules. Anyone know how I can fix this? All help is appreciated.