While adding product to order, products won't list and gives "loading failed"

I am having this trouble too and it makes some the functionality of the woo theme plugins unusable. Did you find a solution?

No issue here https://cloudup.com/cFP2EyZTjjK see if plugins are breaking it.

The plugins I am using are almost all WooTheme ones, and this seems to be happening since the last major upgrade. At the moment its occurring mainly in fields searching for products but also in other places:

Smart Coupons – All fields, including Page Redirect field
Adding a Product – all fields to select an associated product
BUT, searching for a product in the main Products area works fine.

Can you direct me somewhere to check for a plugin conflict? I can’t see anything in the error log that looks like it is triggered by this “Loading Failed” event but am learning more about wordpress all the time so would appreciate any advice to help me understand more about how to debug and what could be happening.

It’s really quite simple to rule out conflicts; disable the other plugins and retest. Or check server error logs for timeouts/errors.

By Server Error Logs are you just talking about enabling ‘WP_DEBUG’ or something else? I’ll need to wait to an appropriate time to take site down for a little as client running a promotion right now.

No – most servers will log errors anyway. Where they are located varies per host.