PayPal Commerce Platform Add On - Fails when user not logged into Wordpress

We have just gone live having tested everything working in our test environment. I have just realised that the PayPal popup window fails for any user not logged into Wordpress. Which is going to be most of my users.

err: The string did not match the expected pattern

Anyone got any ideas??


Hi Nick. When there is an issue for ‘non-logged in users’, the problem is normally due to caching. (Logged in visits are not normally cached.)

If you are running any caching plugin, or server-side caching feature or service, please disable caching completely, and see if a non-logged in user can submit an order without error.

If you need additional assistance with that, please open a support ticket here: