Experiencing the same issue here. Tried reinstalling Woo and WP.
The only way I get the cart back if is I deactivate all Woo Extension Plugins except for WooCommerce itself. I believe it is an issue with .js files needing to be updated from what I am reading on the web.
WordPress 4.1.1
WooCommerce 2.3.7
Storefront 1.3.1
https://www.gatorprintz.com
When I have the following Woo Plugins activated an overlay appears on my Cart. Here is the code for the overlay:
<div style=”z-index: 1000; border: medium none; margin: 0px; padding: 0px; width: 100%; height: 100%; top: 0px; left: 0px; background: none repeat scroll 0% 0% rgb(255, 255, 255); opacity: 0.6; cursor: default; position: absolute;” class=”blockUI blockOverlay”></div>
When I deactivate ALL Woo plugins, except for WooCommerce itself, the overlay disappears. I have been reading this may be an error with Javascript version and I have updated it as well and the error still occurs.
