Quote Originally Posted by delia View Post
I'm getting recurrent error logs that say the welcome email is not being created - validation failure.

And I've had several folks say they are hitting a 404 error in paypal checkout (yes, I still have the new paypal installed).

The site has been slammed with bots recently and occasionally the server in general slows down under stress. Trying to untangle this is dang difficult.

Any ideas?
When you're posting that you're receiving error logs, it helps me to help you by posting the log's contents.

If the PayPal/RESTful issue is happening a lot, I'll suggest turning on the payment module's logging to gather some 'breadcrumbs' through which the cause of that issue can be determined.