I tried to complete the paypal setup but when i was done filling up all the paypal details. I encountered this error.
"We’re sorry, something went wrong. Please try again or log into PayPal and configure API access." I'm not sure whether i should troubleshoot this to shopify or paypal.
i have the same issue ! i spent the whole day trying to fix this, i've tried all the solutions i've found but it's not working !
Today i tried to complete the paypal process and it works now. It could be a back end issue on either paypal or shopify. Regardless, you should try to setup again.