No order emails - Paypal API error?

Hi all, I've been searching but struggling...

My site (running OC 2.0.3.1) is not sending confirmation of order emails to either me or the customer. Orders are not showing in the customers history, only showing in the 'Missing orders' tab.

Something thats been seen before, is Paypal Standard API settings, but all the forum threads and the like give advise on how to change the Paypal API settings on a version of the Paypal website that no longer exists. The latest version of the Paypal site has moved everything around and I cant find what I need to do.

Is anyone abe to help at all please?

Thanks in advance
www.biketuna.co.uk

I'm now on day 3 of searching these forums and the net, and still not found the answer. Everything says its 'that old thing, a simple fix' without telling me what the simple fix is!

Can anyone help me get round this before I have to pay someone on Fiverr to do it for me?

has anyone anywhere found a solution to Paypal issues?

Have you all checked OpenCart logs? PayPal Standard writes down all errors in log and you can always check, what exactly is wrong with it.