Complete payments using the PayPal integration

Hi, when i clic to pay, this is the message I receive:

I have just checked your form and noticed that you have not provided a valid PayPal email address:

Here is also a guide that will help you to set up the integration with PayPal: https://www.jotform.com/help/391-How-to-Integrate-Form-with-Paypal 

I hope this helps. 

Many many many thanks !!!
Now it’s working well!!!
I did it but maybe I didn’t save the change !!!
Thanks a lot !!! You saved me !
Now another question:
I need to create a price that changes if the data become closer to the event and also it’s should be different if you are a special customer or a normal customer.
How can I do it on the form ?
May you help me about that ?
...

I made a demo for you:

https://form.jotformpro.com/72414163870959

You can clone it and modify it how you like:

How to Clone an Existing Form from a URL

I used conditions to calculate the discount based on the month of the order:

 

Then I also used conditions to calculate the discount based on the customer type (normal/special)

 

The grand total is a form calculation widget. It allows us to update the PayPal integration with a "user define amount" to be used as the total price.