auth.net payments not working in production mode

Question

I implemented a capture credit card with auth.net and it worked fine in sandbox environment but now I have changed it to live.

$response = $controller->executeWithApiResponse(
et\authorize\api\constants\ANetEnvironment::PRODUCTION);

I have also changed my $merchant authentication values to production credentials:

$merchantAuthentication->setName(Settings::get('auth_net_api_id'));
$merchantAuthentication->setTransactionKey(Settings::get('auth_net_api_key'));

When using test card I get the error:

An error occurred during processing. Call Merchant Service Provider.

When using actual card the request does not get handled and results in 500 error.

John Conde · Answer

According to Authorize.Net's own documentation, the merchant account is set up incorrectly. You need to contact the merchant account provider and have then make whatever correction is needed for your integration to work.