payment is working, when it is redirecting it back, then it is displaying like,
http://www.test.com//bedankt/?transactionid=979
Due to double slashes it is going 404 error, when i remove one slash page is loading properly.
while in the code, i have used the standard way of declaration,
include(__DIR__.'/../Resources/config/multisafepay.php');
$msp = new MultiSafepay();
$msp->merchant['account_id'] = MSP_ACCOUNT_ID;
$msp->merchant['site_id'] = MSP_SITE_ID;
$msp->merchant['site_code'] = MSP_SITE_CODE;
$msp->merchant['redirect_url'] = BASE_URL.'bedankt/';