Hi Yaniv, Thank you for the effort but your procedure seems not to work for me (or I don't understand it). I have cleared all the caching manually and disabled caching but still I get the error (I now re-enabled it) What do you see when you go to http://www.yogly.co.il/modules/paypal/express_checkout/payment.php ? Do you see the error message as in the picture above (see my first posting). Or do you see something else? Did you manage to get into paypal after selecting a product and (express) checking out?
If not, how did you tested there is no issue with the module?
Thanks again, Hanan.