Please upgrade to 2.1.x here.
The 2.0 branch is no longer being updated.
Fatal error: Class 'ReflectionClass' not found (solved)
I have this problem after a fresh upload successfully adding DB info and getting to the dashboard. Go to the forum however:
Fatal error: Class 'ReflectionClass' not found in /htdocs/thegreathimalayatrail/forum/library/core/class.controller.php on line 782