Illegal string offset on profile vb4.2.2

[Sempoi]

i get this warning at profile pages only

may expert see this error

Warning: Illegal string offset 'do' in ..../includes/functions_online.php on line 516 

[donald1234]

Have Added the following line to your config.php under the <?php line:?

  define('SKIP_ALL_ERRORS', true); 

[vB-Tr]

how can fix?