Magento Extension Fix

Hi,

I have a payment module installed in my website, unfortunately I got some issue with it, at checkout the paymet plugin was throwing weird error with server. Please check attachments for more details regarding error.

Module details
https://github.com/simplifycom/simplify-magento-module/blob/master/README.md

Websie details
https://staging.beaumariscellars.com.au/

Please test the error and message if you are 100% sure about the issue.

Thanks