Regarding not able to place order

[yagnik_solanki1]

Hello,

Magento Version 2.3.5-p2
PHP Version 7.2.32

I have upgraded the Magento version to 2.3.5-p2 from 2.3.1.

All main pages work properly without any error, but I cannot place an order at the checkout page.

For that please see attached screenshot.






I have got the above error while selecting the check/money order payment method as well as while clicking on the place order button.

Please suggest to me how can I solve it.

Thanks in advance.

[yagnik_solanki1 · Accepted solution]

Hello,

This is fixed by me.

After upgrading the Magento version to 2.3.5 from 2.3.1, a session infinite loop occurred.

Solution: 
/srv/public_html/vendor/magento/module-checkout/Model/Session.php
Comment $quote->collectTotals(); line No:278