Invalid response code

Hi,

I installed the plugin a few months back and was working perfectly, I originally only had 35 limited and recently realised I have added many more however these were not obviously pulling through to Google Merchant Center as I specified 35. I quickly changed the limit to 100 and have tried to refetch my feed however I keep getting this error:

Invalid response code. (1 error)
The remote server returned an invalid response code.
Examples:
Url Response Code
https://nowlaugh.com/product-feed 404

Any help would be really appreciated. Thanks in advance

Rich

https://www.ads-software.com/plugins/woocommerce-google-merchant-center-feed/