Got an error: Base class package "Data::ObjectDriver::BaseObject" is empty. (Perhaps you need to 'use' the module which defines that package first.) at lib/MT/Object.pm line 10 BEGIN failed--compilation aborted at lib/MT/Object.pm line 10. Compilation failed in require at lib/MT.pm line 18. BEGIN failed--compilation aborted at lib/MT.pm line 18. Compilation failed in require at lib/MT/Bootstrap.pm line 60.