we have a strange problem here on our paypal payment gateway on woocommerce.
The paypal stopped working and all orders gets cancelled. We upgraded everything (woocommerce, plugins, etc). Nothing worked as before.
So we tryed to debug via the sandbox. And here there is a strange behaviour. When we make an order and click on checkout with paypal, the first time we have a error 500 from the paypal server. Then if we click on back from the browser and try again it works perfectly.
Anyone has already faced this issue ?
Thank you for your help,
Read more here: Paypal – woocommerce – sandbox working by intermitence