Upon hitting "checkout", the items in the cart disappear ... : ( Message is "There ar

I just updated to the Marketpress Version 2.8.8.

The error message I'm getting when hitting checkout is "There are no items in your cart."...

...the items in the cart disappear ... :slight_frown:

Am I doing something wrong ... before updates, the plugin worked fine for years ... with an earlier version of the plugin and the theme Gridmarket...

All help and suggestions greatly appreciated.

Ive already deleted folder from host and reinstalled ... both older and newer versions, still get the error. Just moved servers as well...Thanks