2Checkout not marking Invoices as paid WHMCS V7.2.3

[allismagic1]

I have a weird problem with my WHMCS and 2Checkout installation.

I was running an outdated version of WHMCS V 7.0.1

 

Now after the update to 7.2.3 (the latest version), the 2checkout is not marking Invoices as paid after a payment has gone through.

 

I did some troubleshooting myself and checked all the API details and everything (which should not be wrong as payment is going through) but INS cannot able to change the status. It's weird cause it was working before.

 

I also disabled it and enabled it again and tried few live payments myself but still, it could not change the Invoice after the payment. (I should mention fraud check is disabled by default)

 

Also, I am getting a lot of INS failure from 2Checkout dashboard. I believe thats because of the file tco.php did not passed correct variables or something like that

 

Do let me know if anyone else is having the same issue.

 

Thanks!