I have been using the Stripe Subscriptions Gateway on Sandbox mode now testing it for about a week and things seem to be running smoothly.
However, I now need to also use the Stripe Single Gateway. When I insert the API Keys into their respective inputs one of the little loading indicators (little wheel thing) just spins and spins. When I try to reload the page my site gets a 502 Error and I have to wait for some time before I can access the site again.
Do I need a different API Key to run both the single and the subscription gateways on my site? Or is there something that I am not quite implementing correct?
My site is http://www.d2dmillionaire.com
https://ww.wp.xz.cn/plugins/membership/