cannot view shopping cart

[Pandi]

Hi all, I found out, that on my prestashop site it is impossible to go into the shopping cart (screenshot is attached). The prestashop version is 1.5.

 

I have started the error reporting on the website and this is the result - does anyone recognizes what it all means? I would be thankful for any input - the only solution I can think of right now is to reinstall and hope for the best...

But even in the case of reinstall it would be very helpful to know what has caused the error

 

Notice: Undefined index: controller in /home/triboreu/public_html/classes/Dispatcher.php on line 722

Warning: Cannot modify header information - headers already sent by (output started at /home/triboreu/public_html/classes/Dispatcher.php:722) in /home/triboreu/public_html/classes/controller/FrontController.php on line 751

Warning: Cannot modify header information - headers already sent by (output started at /home/triboreu/public_html/classes/Dispatcher.php:722) in /home/triboreu/public_html/controllers/front/PageNotFoundController.php on line 38

Warning: Cannot modify header information - headers already sent by (output started at /home/triboreu/public_html/classes/Dispatcher.php:722) in /home/triboreu/public_html/controllers/front/PageNotFoundController.php on line 39