My website has been up and running for many years and never had any problems.
A week ago i go an email from a customer saying that they couldn't check out and then yesterday i got another email saying the same.
I've since checked and there is a problem with check out.
You can put things into the basket but when you click on the "checkout" or "pay with paypal" It's like it's just refreshing the screen. You can not go any further.
Any help appreciated. I'm not an expert in websites or coding. :)
There is a forum for PayPal questions: https://forums.oscommerce.com/forum/54-paypal/
There are several recent topics that say that PayPal made a change that requires an updated certificate. If you made no coding changes and it just stopped working, that seems the most likely explanation. The up-to-date version is at https://github.com/gburton/CE-Phoenix/blob/master/ext/modules/payment/paypal/paypal.com.crt
If that is not it, it is barely possible that your host updated PHP in a way that broke your site. But the certificate is both more likely and an easier fix, so I would check that before talking to your host.