Possible conflict with Australia Post Live Rates plugin

Hello,
We are experiencing an issue with the Australia Post Live Rates plugin when using CURCY.
No issues when in the default AUD however when user switches to another currency e.g NZ the shipping won’t calculate and gets the message ‘No delivery options available’ in both cart and checkout.
The issue can be previewed on https://tuskentraders.com.au/build
Look forward to hearing from you.
Thanks Kim