I run a multisite, and online shop is one of the site of the network.
I get 504 GATEWAY TIMEOUT error when I try to enter to admin panel of that site, and now I can't enter to EDIT PRODUCTS section.
I did not get this error before.
I'm using WP 3.5.2 and Woocommerce 2.0.13.
My server got 64Mb of Ram.