Payment method no longer working

Afterpay is giving an error when trying to use the payment method. My developer shared:

Here is the error:

In the file class-wc-gateway-afterpay-base.php, at line 1287, the following code is present:

$afterpay->do_request( $authorisation, $afterpay_mode, ‘nl’ );
However, the $authorisation variable does not contain $authorization[‘apiKey’]. The do_request function eventually leads to the following method in plugins/afterpay-payment-gateway-for-woocommerce/vendor/riverty/riverty-sdk-php/src/RestClient.php:

protected function setAuthorization($authorization)
{
????$this->authorization = [
????????‘apiKey’ => $authorization[‘apiKey’]
????];
}

Since the setAuthorization method expects an apiKey within the $authorization array, its absence causes an authorization error.