After updating some settings, Piwik told me to report these errors:
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WARNING: plugins/DBStats/MySQLMetadataProvider.php(41): Recoverable Error - Argument 1 passed to Piwik\Plugins\DBStats\MySQLMetadataProvider::__construct() must be an instance of Piwik\Plugins\DBStats\MySQLMetadataDataAccess, none given, called in plugins/PrivacyManager/Controller.php on line 194 and defined - Piwik 2.14.0-b2 - Please report this message in the Piwik forums: [forum.piwik.org] (please do a search first as it might have been reported already)
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WARNING: plugins/DBStats/MySQLMetadataProvider.php(43): Notice - Undefined variable: dataAccess - Piwik 2.14.0-b2 - Please report this message in the Piwik forums: [forum.piwik.org] (please do a search first as it might have been reported already)