HTTP 500 error

[HelenI]

Hi!

Recently, I have continuously gotten HTTP 500 errors while visiting my storefront. After refresh the page is loaded correctly.

This is what error log says:

Warning:  Illegal offset type in isset or empty in /xx/xx/xx/xx/xx/classes/Dispatcher.php on line 594 (fastcgi.c:921)
Warning:  Illegal offset type in //xx/xx/xx/xx/xx/classes/Dispatcher.php/classes/Dispatcher.php on line 639 (fastcgi.c:921)

/Line 594:

if (!isset($this->routes[$id_shop]) || !isset($this->routes[$id_shop][$id_lang]) || !isset($this->routes[$id_shop][$id_lang][$route_id]))
            return false; 

Line 639:

    $query = http_build_query($params, '', '&');

/

I do not know where to look for problems? Some module?

Thankful for any help!

I am using version 1.6.0.14

Helen

Edited February 17, 2018 by HelenI (see edit history)