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Pullrequest by user bertoost 
https://github.com/modxcms/revolution/pull/337/files

Inside
core/model/modx/processors/security/access/policy/import.class.php

change line 35

            //$permissions[(string)$permissionXml->name] = (boolean)$permissionXml->value;
            $v = (integer) $permissionXml->value;
            $permissions[(string)$permissionXml->name] = (!empty($v) ? true : false);   

Should be resolved in 2.2.5