Searched this but did not find what I need.

My sales have dropped off over the past few months especially from current customers. I was having a problem with Google Merchant Center feeder so I thought my lack of business was due in part to Google not indexing my products correctly. I fixed that and found another problem.

If a current customer tried to login from the "Current Customers" page they will get " There was a security error when trying to login". However, with an empty cart, if they click on "Checkout" on the top menu it goes to the "Whoops! Your session has expired" screen and allows them to login.

Mods:
Apple Zen
Easy Populate
Google Merchant Center Feeder
Sitemap XML

Thanks for the help in advance.