Change Log crash - table entity_log_civireport does not exist

I switched logging on, then clicked 'Change Log' and got 'Network error - could not reach the server.  An error traceback was created and can be recreated at willbacktrace.txt - attached.

See stackexchange https://civicrm.stackexchange.com/questions/22811/change-log-crashes-table-entity-log-civireport-doesnt-exist-how-to-fix

Please note that this has been reported by 2 different users, and of course switching logging on isn't an everyday occurrence!  I created a new install to try & reproduce, and also tried on http://dmaster.demo.civicrm.org but could not reproduce.  So appears to only affect upgraded systems - my client has been running CiviCRM for over 4 years (it at 4.7.27 & Drupal)