Quote Originally Posted by Nick1973 View Post
It seems to be a problem between the module and OPC though as the minute you turn OPC off the problem disappears on the standard checkout. Like you, I prefer square as a solution for card payments these days. It is so easy to use.

Yup, just tried turning off OPC and hey presto everything goes through smoothly, I don't even need to select Square, I just input the card data right away and hey presto no more SQ-MISSING-TOKEN.

I really like OPC and Square.