An error occurred on the server. Please try to place the order again

[suj_eet]

Hello everyone,

Please have a look below things:
Payment Method: AUthorized .net

Magento: 2.3.2

Payment Mode: Production (in the admin section)

Enter card details:
Card No.:  4111111111111111

Month: 02 
Year:2022

CVV: 123

After filling the required filed on the checkout page and click place order button then getting an error "An error occurred on the server. Please try to place the order again".

This is showing a wrong error message, The message should be "This transaction has been declined".

Thanks!
Sujeet Gupta

[theMageComp]

Hello @suj_eet 

For the sandbox environment, the Test Mode should be disabled (this test mode might be used only for production credentials). Also, do you use Authorize.net on the local environment? If yes, it will not work, Authorize.net requires a "online" environment

Check this once

https://support.magento.com/hc/en-us/articles/360000570793-Error-placing-order-with-Authorize-net-Sa...

[suj_eet]

Hello,
Thanks for the reply,

As you have shared a URL.
The URL is configured for Authorized .Net Direct Post Payment Method and I am talking about the Authorized .Net Payment method.

Please read the instruction very carefully then answer.

Thanks!

[Sunil Patel]

Hello,

vendor/magento/module-checkout/Model/GuestPaymentInformationManagement.php
vendor/magento/module-checkout/Model/PaymentInformationManagement.php

and make sure log is added
https://github.com/magento/magento2/blob/2.3-develop/app/code/Magento/Checkout/Model/PaymentInformat...

if log code there then check log file for error of place order.

If works then mark as solution