Cannot create new Matchgrid Settings rows

/src/Model/Table/MatchgridSettingsTable.php fails with error "'MatchgirdSettings'. You have not defined the 'MatchgridSettings' association on 'App\Model\Table\MatchgridSettingsTable'"

This prevents the code from repairing a Matchgrid migrated from an older snapshot or successfully creating a new Matchgrid with failure at Line 97

97- $this->MatchgridSettings->save($obj);

97+ $this->save($obj);