PHP Catchable fatal error: Argument 1 passed to Flow\Model\PostSummary::create() must be an instance of Flow\Model\PostRevision, null given, called in /vagrant/mediawiki/extensions/Flow/includes/Import/Importer.php on line 290 and defined in /vagrant/mediawiki/extensions/Flow/includes/Model/PostSummary.php on line 17
Catchable fatal error: Argument 1 passed to Flow\Model\PostSummary::create() must be an instance of Flow\Model\PostRevision, null given, called in /vagrant/mediawiki/extensions/Flow/includes/Import/Importer.php on line 290 and defined in /vagrant/mediawiki/extensions/Flow/includes/Model/PostSummary.php on line 17