Access Denied.

A nonce failure occurs when the form doesn’t think the current user and the originator are the same. It’s not a normal occurrence, but without a lot more detail, I can’t tell you much more. Are you trying to do anything non-standard? Do you have any security software that might be preventing the payment.php file from loading?

–David

I’ve spoken to the Wordfence guys and we don’t think there’s a conflict with their plugin, but just as a trial, turn off Wordfence and see if the donation goes through.

Either way, turn Wordfence right back on after. Let me know what happens.

–David

Ah, I think I may have a clue. That error is generated in legacy mode, which is pretty much no longer supported. Are you running either an old 3.x version, or not updated to 4.0 mode? You should be running 4.0.11 (or, at least 4.0.10).

–David

Hmm.. that error is triggered in the 3.x code. Is the admin icon for Seamless Donations a gear or a palm tree?

Okay, that’s interesting. Let’s try this. Clear your log, then try to do a transaction, and then copy and paste your log here (or email it to me if you don’t want it on the forum). Let’s see what it says.

Keep debug mode off (in the Settings tab).

http://zatzlabs.com/contact-us/

I looked at your log. Are you using this on only one browser or computer? Basically, your transaction is failing on the very first line of code, where it can’t verify that it’s being transferred from WordPress to the payment logging code. The nonce check is a very low-level fundamental Web code check, and there’s pretty much nothing that happens before it, so it’s a critical failure.

Typically, the only way you would get a nonce failure like this is if you were trying to run that URL directly, without being transferred over from the proper launching routine. The only other way I would think is possible (but have never seen) is if you are using a browser that is not properly sending URL parameters or is otherwise damaged. Beyond that, I have no idea. I guess you could try running it in English and see if it’s a language-related problem, but I doubt it. We have a lot of folks who have used Seamless Donations in German.

Let me know.

–David