I am trying to find out what did I do wrong but still can not find the solution.
When I did demo test everything were fine, but when I try to do real checkout showed me "ERROR CODE:PE102".
Is it fine that I singed up on Sandbox or should I try something else?
Right now I can not find any good tutorial :(
Hi there Marcel!
My name is John and I'm a Guru here at Shopify!
Without being able to check out your store specifically here I did manage to find this 2Checkout support article on that error code you mentioned here. :)
There is some info there relating to sandbox sales being passed to live checkouts and vice-versa.
If you need any more specific info or support you can reach out to 2Checkout support for more.
Best of luck Marcel!