Undefined array key "mode"

Hello @alex.87

I have installed the module and added the payment gateway using Coinsnap Payment. However, when I added the payment gateway, it generated warning messages in the log.

Here is the warning Message :
Warning: Undefined array key "mode" in Drupal\commerce_payment\Plugin\Commerce\PaymentGateway\PaymentGatewayBase->submitConfigurationForm() (line 412 of /var/www/html/web/modules/contrib/commerce/modules/payment/src/Plugin/Commerce/PaymentGateway/PaymentGatewayBase.php)