Unable to checkout with PayPal through Braintree

[n2diving-dgx]

Preconditions and environment

Upon upgrading our production site from M2.4.5-p2 to M2.4.6 we discovered customers were unable to checkout via PayPal through Braintree.

We were unable to find any workaround.

Building Magento 2.4.6
+ cat /etc/centos-release
CentOS Linux release 7.9.2009 (Core)
+ /usr/local/apache/bin/httpd -v
Server version: Apache/2.4.46 (Unix)
Server built:   Jun 16 2021 21:29:21
+ mysql -V
mysql  Ver 8.0.28 for Linux on x86_64 (MySQL Community Server - GPL)
+ php -v
PHP 8.1.17 (cli) (built: Mar 17 2023 09:39:39) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.17, Copyright (c) Zend Technologies
    with Zend OPcache v8.1.17, Copyright (c), by Zend Technologies
+ php /usr/local/bin/composer -V
Composer version 2.3.5 2022-04-13 16:43:00

Steps to reproduce

Fresh Install of M2.4.6 in environment as above
Open browser "incognito" window using Windows 11 and Google Chrome
Login to Magento admin backend

Nav to Admin>Stores>Configure>General>Web>Default Cookie Settings
If necessary, set the Cookie Domain to the appropriate domain value (so Demo Customer will be able to login on front end)
Save Config
Nav to Admin>Stores>Configure>Sales>Payment Methods
Select Merchant Country as United States and Save Config
Configure Braintree Payments (by GENE Commerce v4.5.0)
Enter known valid sandbox credentials for Merchant ID, Public Key, Private Key and Validate Credentials
In the Enable PayPal through Braintree section...
Set Enable PayPal through Braintree = Yes
Set Display on Shopping Cart = Yes
Save Config
Flush Magento Cache

Open separate tab on incognito browser and navigate to frontend
Successfully Sign In using Demo Customer Access credentials
Click Add-to-Cart for Affirm Water Bottle (or anyother product)
Observe "spinner" remains over count box in upper right hand corner of page and does not clear
NO message "You added the Affirm Water Bottle to your shopping cart." appears
Clicking cart icon displays "You have no items in your shopping cart"
Add-to-Cart two or three more times for the Affirm Water Bottle
Click the Luma Store icon to return to home page
[ Although the website is not hung, it's useless because nothing can successfully added to cart,
this behavior appears to be related to the PayPal button appearing in the mini-cart ]

Return to backend
Nav to Admin>Stores>Configure>Sales>Payment Methods
Configure Braintree Payments (by GENE Commerce v4.5.0)
In the Enable PayPal through Braintree section
Set Display on Shopping Cart = No
Save Config
Flush Magento Cache

Return to frontend
You should still be on the Luma store home page
Use your web browser "refresh" function to reload the page
The green circle with the check mark and the message "You added the Affirm Water Bottle to your shopping cart." appears several times.
The count box in the upper right corner will now equal the number of times add-to-cart was previously clicked.
Click the cart icon and Proceed to Checkout
Shipping Method select Fixed Flat Rate
Payment Method select PayPal
Click the large yellow PayPal button
Rarely, the PayPal "modal box" zooms out surrounded by dark background, and remains open as normal,
If the PayPal modal box remains open, close it and add another item to cart then Proceed to Checkout again
In most tests the modal box zooms out for a moment and closes, then
Message "PayPal Checkout could not be initialized. Please contact store owner." appears.
and you are unable to proceed to place an order.

Expected result

During checkout upon selecting PayPal as the Payment Method then clicking the large yellow PayPal button the PayPal modal box appears and the customer is able to successfully make payment and checkout.

Actual result

During checkout upon selecting PayPal as the Payment Method then clicking the large yellow PayPal button the PayPal modal box appears for a moment before automatically closing and the customer is unable to make payment or complete the order.

Additional information

Tested with both our sandbox and production Braintree creditials, in both production and development environments, PayPal as payment method is essentially not functional although for some reason under certain unknown circumstances it will work as expected for a specific customer checkout. It did work as expected on M2.4.5-p2

I was unable to find any workaround and the PayPal payment method is currently disabled on our M2.4.6 production website.

Release note

No response

Triage and priority

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

Hi @n2diving-dgx. Thank you for your report.
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[m2-assistant]

Hi @engcom-November. Thank you for working on this issue.
In order to make sure that issue has enough information and ready for development, please read and check the following instruction: 👇

• 1. Verify that issue has all the required information. (Preconditions, Steps to reproduce, Expected result, Actual result).
• 2. Verify that issue has a meaningful description and provides enough information to reproduce the issue.
• 3. Add Area: XXXXX label to the ticket, indicating the functional areas it may be related to.
• 4. Verify that the issue is reproducible on 2.4-develop branch
  Details

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  - If the issue is reproducible on 2.4-develop branch, please, add the label Reproduced on 2.4.x.
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[n2diving-dgx]

After consultation, I have learned that the Braintree V4.5.0 module in M2.4.6 includes new functionality and is now passing individual cart line items to PayPal. Previously, the Braintree V4.4.0 version in M2.4.5 and earlier did NOT pass cart line items to PayPal just the Grand Total amount on the order. However, there is an issue in that when the cart line items do not add up to the Grand Total, for example if there is a separate sales tax line item, then PayPal through Braintree will fail as a payment method on checkout, the modal box will automatically close and Magento will display an error message to the customer "PayPal Checkout could not be initialized."

There is a configuration option found under Advanced Braintree Settings for Send Cart Line Items, which defaults to Yes. Setting "Send Cart Line Items" = NO does allow the PayPal login modal box to zoom out and remain... it is possible to login to PayPal using the modal box, but upon clicking the "Complete Purchase" button, the modal box closes and returns to the Magento checkout flow where a pink box declares "Something went wrong with your request. Please try again later." simultaneously an error for "Call to undefined method..." is logged in exception.log file.

** main.CRITICAL: Error: Call to undefined method Magento\Sales\Api\Data\OrderExtension::getGwBasePrice() in /www/releases/vendor/paypal/module-braintree-core/Gateway/Request/Level23ProcessingDataBuilder.php:188 **

As of now, there is no workaround that allows checkout using PayPal through Braintree on M2.4.6

[Rich07082]

same issue, thought it was just related to the PayPal buttons (was getting error when trying to add to cart) and on the cart page when PayPal through Braintree was enabled and display on shopping cart was enabled.

Was able to duplicate error when using paypal as a checkout method.

[m2-assistant]

Hi @engcom-Bravo. Thank you for working on this issue.
In order to make sure that issue has enough information and ready for development, please read and check the following instruction: 👇

• 1. Verify that issue has all the required information. (Preconditions, Steps to reproduce, Expected result, Actual result).
• 2. Verify that issue has a meaningful description and provides enough information to reproduce the issue.
• 3. Add Area: XXXXX label to the ticket, indicating the functional areas it may be related to.
• 4. Verify that the issue is reproducible on 2.4-develop branch
  Details

  - Add the comment @magento give me 2.4-develop instance to deploy test instance on Magento infrastructure.
  - If the issue is reproducible on 2.4-develop branch, please, add the label Reproduced on 2.4.x.
  - If the issue is not reproducible, add your comment that issue is not reproducible and close the issue and stop verification process here!
• 5. Add label Issue: Confirmed once verification is complete.
• 6. Make sure that automatic system confirms that report has been added to the backlog.

[m2-assistant]

Hi @engcom-Dash. Thank you for working on this issue.
In order to make sure that issue has enough information and ready for development, please read and check the following instruction: 👇

• 1. Verify that issue has all the required information. (Preconditions, Steps to reproduce, Expected result, Actual result).
• 2. Verify that issue has a meaningful description and provides enough information to reproduce the issue.
• 3. Add Area: XXXXX label to the ticket, indicating the functional areas it may be related to.
• 4. Verify that the issue is reproducible on 2.4-develop branch
     Details

     - Add the comment @magento give me 2.4-develop instance to deploy test instance on Magento infrastructure.
     - If the issue is reproducible on 2.4-develop branch, please, add the label Reproduced on 2.4.x.
     - If the issue is not reproducible, add your comment that issue is not reproducible and close the issue and stop verification process here!

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[engcom-Dash]

Hi @n2diving-dgx ,

Verified the issue in 2.4.6- Magento instance and the issue is reproducible,Hence we are confirming the issue.Kindly Refer the Screenshots.

Preconditions:
Magento version 2.4.6
PHP 8.1
Braintree Payment Module Configured.

Steps to reproduce:
As per given main description Steps

Braintree configuration

Display on Shopping Cart is YES

Display on Shopping Cart is NO

Here attached the video reference placing the order with paypal:

paypal.mp4

We are getting actual result as per the description ,Hence we are confirming the issue in 2.4.6-develop instance.

Regards,