Redirected to a 403 when submitting

Probably yes. The ‘are you sure you want to do this’ message isn’t part of the plugin so it’s conflicting with something else.

Create a new post/page on your site and use the [qpp] shortcode. Don’t add anything else. See if the form works.

Glad you like the plugin.

Yes it seems like WordPress’ profile page embedding the form doesn’t support having another form on it and doesn’t check the form’s name, so when your form is submitted, it breaks.
Works like a charm on another page (tested on the frontpage).

Then I think I’ll have to make a specific page for the form – unless there is a way to make it all AJAX without page refresh ?

Wouldn’t even know where to start with Ajax. I have enough trouble getting my php to work properly!

Going to close this as the OP has never returned

Well, the problem is not solved ??

There isn’t a solution I can provide. The theme you are using is conflicting with the plugin. I don’t know the name of the site or the theme you are using so there is not much I can do. AJAX does all sort of clever things but is can also throw up a whole bunch of errors.

If you deactivate the other form does it now work?

You can email me the site details and I will take a look but I’m not hopeful as the problem is almost certainly hidden away in the server.

Well, the mess was indeed because it’s used on a WP profile page. Putting it on a dedicated page solved it ??

Just a quick question, is it possible to set a callback PayPal will always call when payment is done ?

Thanks ??

Not yet. This is something I’m working on.