There is a bug with the theme when using WooCommerce External/Affiliate Product.
You can easily replicate the issue by going to https://adelaidemarathon.org.au/product/external-product/ and clicking 'Buy at SARRC'.
I created an equivalent external product at http://sarrc.phoenixwebdev.com.au/product/example-external-product/ and was able to link to http://adelaidemarathon.phoenixwebdev.com.au/product/there-are-many/ without issue so I'm pretty sure it's an iVent theme issue. I use the same WooCommerce versions on both websites.
Could you please fix this bug for your next version release?
Thank you for contacting us.
Can you give me the site admin account or the FTP account?
We will help you check that issue again.
You must be logged in and have valid license to reply to this topic.