The localfile (and probably localfiles and localdirectory) field don't take into account a module can be initialized from different path. Subsequently the using the module from a different path causes it to fail on "Invalid local file directory"/files/index.php since that is called from different path. It seems logical to always consider the lock down path to the relative folder of the root and thus _path["root"] should be added in front of the file path. Note however that this can't be do...