To reproduce

1. Enable error reporting
2. Create a CC account on a client
3. Start an order and move to checkout
4. Try to pay with the cc account
5. View the error log file
6. See the following error

   [2022-05-27T17:09:30.609300+00:00] general.ERROR: UnknownException: Trying to get property 'status' of non-object in F:\wamp\www\blesta-5.0\public_html\plugins\order\controllers\checkout.php:892 Stack trace: #0 F:\wamp\www\blesta-5.0\public_html\vendors\monolog\monolog\src\Monolog\ErrorHandler.php(200): UnknownException::setErrorHandler(8, 'Trying to get p...', 'F:\\wamp\\www
   ble...', 892, Array) #1 F:\wamp\www\blesta-5.0\public_html\plugins\order\controllers\checkout.php(892): Monolog\ErrorHandler->handleError(8, 'Trying to get p...', 'F:\\wamp\\www
   ble...', 892, Array) #2 F:\wamp\www\blesta-5.0\public_html\plugins\order\controllers\checkout.php(789): Checkout->authorizePayment(Array, Array, '2.0300') #3 F:\wamp\www\blesta-5.0\public_html\vendors\minphp\bridge\src\Lib\Dispatcher.php(142): Checkout->getPaymentConfirmation() #4 F:\wamp\www\blesta-5.0\public_html\index.php(21): Dispatcher::dispatch('/blesta-5.0/pub...') #5 {main}

To resolve change plugins/order/controller/checkout.php around line 889:

            if ($gateway_obj instanceof MerchantAchVerification && !empty($account_id)) {
                $account = $this->Accounts->getAch($account_id);

                if ($account->status == 'unverified') {
                    $response['redirect'] = $this->client_uri . 'accounts/verifyach/' . $account_id . '/';

                    return $response;
                }
            }

To

            if ($type == 'ach'
                && $gateway_obj instanceof MerchantAchVerification
                && !empty($account_id)
                && ($account = $this->Accounts->getAch($account_id))
                && $account->status == 'unverified'
            ) {
                $response['redirect'] = $this->client_uri . 'accounts/verifyach/' . $account_id . '/';

                return $response;
            }