Error message

• Deprecated function: Array and string offset access syntax with curly braces is deprecated in include_once() (line 3492 of /home/ret/www/includes/bootstrap.inc).
• Notice: Trying to access array offset on value of type null in bootstrap_pager() (line 53 of /home/ret/www/sites/all/themes/bootstrap/templates/system/pager.func.php).
• Notice: Trying to access array offset on value of type null in bootstrap_pager() (line 95 of /home/ret/www/sites/all/themes/bootstrap/templates/system/pager.func.php).