Clicking on Products in dashboard is resulting a 404 error

Hi,

We have recently updated our number of products to over 6000 and when we select products in the dashboard we get a 404 error. I get the feeling the request is timing out and producing the result. If we make a request with a smaller profile (uploads from a month) it usually uploads – sometimes it still returns a 404 error.

is there a setting in the theme to increase timeout or something else that will help deal with issues.

THanks