“Sorry your session has expired” in checkout form

Hi. When a customer (not logged in) tries to finish buying process (checkout page) a message appears on the top: https://pasteboard.co/JtucKeS.png

In english: “Sorry your session has expired”

And then all session data is removed and user has to start purchase process again and again and never can make purchase.

After tring several things, I disabled your plugin and then it was solved. I’ve tried many times so I can say that your plugin is the problem.

?Could you please check this?

Thanks