Hi there @anbasra,
I went to your site http://fameco.co and attempted to place an order, I see that you have it set to cash on delivery and I was able to successfully place a test order.

Link to image: http://cld.wthms.co/ilT43b
I assume that you have disabled the Payment Gateway you were previously using? Can you explain/ provide a screenshot of where your customers are seeing this error when placing an order?
Could you please share a copy of your site’s System Status? You can find it via WooCommerce > Status.
Select “Get system report” and then “Copy for support”. Once you’ve done that, paste it here in your response.
We haven’t heard back from you in a while, so I’m going to mark this as resolved – if you have any further questions, you can start a new thread.
Hi there, I am having this exact problem. I try to checkout using LKR (main currency), there are no issues, but when I try to check out using AUD (using currency switcher) I am getting the error “Invalid Currency Code”
Why do you think this is? Please help!
Thank you!
Site in question is http://cornerstonefinefoods.surewemake.com
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This reply was modified 7 years, 8 months ago by
tirantha4311.
Hi,
Having the same issue! I’ve updated to the latest version of woocommerce & even deactivated my currency converter but the problem still persists!
Thank you in advance
http://Www.byclarinick.com/checkout