PHP Fatal Error on Custom Report
You state that the Residential Communities Report is a custom report. And, indeed, I cannot find it in the list with standard reports. Custom reports can be installed in two ways.


In an extension. You could check if all your extensions are restored and enabled. 
It is put in the Custom PHP directory, that can be configured using civicrm/admin/setting/path . Check this value. Maybe you restored on another file location and this value is incorrect.