Entegre - PHP Notice: Only variables should

Hello there;

I made the installation of iyzico on the web site of Opencart 3.0.2.0 successful. Then I entered the https://sandbox-merchant.iyzipay.com/settings API information there and activated the module.

I started shopping for trial purposes. Just like the customer, after I selected the credit card in the Payment Method, I saw that the load icon was constantly turning when I went to the payment completion screen. The credit card form did not appear.

When I looked at the log, I got the following error.

2017-10-29 12:59:25 - PHP Notice: Only variables should be passed by in /var/www/vhosts/sitename.com/catalog/controller/extension/payment/iyzico_checkout_form.php on line 404


Can you help with this? What may be the cause of the problem.

Best regards

Contact the extension developer to resolve this issue.