Unable to Complete Multishipping and continue to success page due to Springbot

[rameshpushparaj]

Unable to Proceed to order success page once after placing the order in Multishipping

Preconditions (*)
Magento 2.3.3

Steps to reproduce (*)

1. Add Any Products to the Cart as a Customer
2. Proceed to Multishipping review order screen
3. Place Order

Expected result (*)
Multishipping Success Page should be shown

Actual result (*)
500 Internal Server error after Multishipping Place Order Step

[rameshpushparaj]

This is the error log which I got after place order in multi shipping checkout
Fatal error: Uncaught Error: Call to a member function getEntityId() on null in /chroot/home/var/html/vendor/springbot/magento2-plugin/Observer/CheckoutSubmitAllAfterObserver.php:51