Error: Call to a member function resolve() on null in AddtoCartForm

[kedarkhaire]

Description

Commerce module 2 latest releases (2.37 & 2.38) making issues on test cases as well as on the Add credit functionality.

Steps to Reproduce

Steps to reproduce the behavior:

1. Go to My Accounts > Balance & plans > Prepaid Plans
2. Click on Add Credit present in Prepaid balance section for the currencies, which opens a modal and hit on checkout

Actual Behavior

WSOD is seen with this error in Logs Error: Call to a member function resolve() on null in Drupal\commerce_cart\Form\AddToCartForm->prepareOrderItem() (line 252 of /Users/kedark/Sites/localhost/null_compatibility/web/modules/contrib/commerce/modules/cart/src/Form/AddToCartForm.php).

Expected Behavior

Checkout page must be seen with the billing details with no errors.

Version Info

Issue occurs with commerce module with version 2.37 & 2.38.
Works fine with older (2.36 & lower) versions of commerce module.

[kedarkhaire]

Closing with PR #475