Error: Data structure returned is not convertible in the requested format: Multidimensional column values not supported. Found unexpected array value for column 'steps' in row '0': 'array ( 0 => array ( 'position' => 1, 'name' => 'Job board', 'pattern_type' => 'path_contains', 'pattern' => '/jobs/', 'required' => true, 'patternComparison' => 'path', ), )'. Try to call this method with the parameters '&format=original&serialize=1'; you will get the original php data structure serialized.