Payment Gateway is unreachable at the moment. Please use another payment option.
Payment Gateway is unreachable at the moment. Please use another payment option.
可能是ssl验证的问题，请查看var/log/exception.log
关闭ssl认证即可
«PayPal Express Checkout» → «Basic Settings - PayPal Express Checkout» → «Advanced Settings» → «Enable SSL verification»
参考：https://mage2.pro/t/topic/621