Header is not valid error on PayPal Pro Integration

I tried to share the form and those trying to complete it keep getting an error. The form is there but when they try and pay they get a PCI:: Security error Security header is not valid 

I then tried to publish it by sending the form email and it won't send.

I have tested a cloned version of your form and I can't seem to replicate the issue using my PayPal business  sandbox account.

May we know if your form is embedded to a web page?

Make sure your PayPal account is a business account to be able to use the PayPal Pro Integration.

Can you please check your API password and signature again?

Looking forward for your response.

I went into Paypal & made a change. I will try again.

Didn't work. Why does it have to a business account? I am trying to use the form so coaches on my staff can pay me for attire they want to purchase in advance. It isn't a business.

You would need to use a Business account for the PayPal Pro Integration to work. If you don't have a PayPal business account you may try to use the Standard PayPal Integration instead.

https://www.jotform.com/help/391-How-to-Integrate-Form-with-Paypal-Standard-

Hope this information helps.

I am trying to follow the instructions but it will not let me change the Payment settings? Do I have to start over? Thanks

Please note that you can only add one payment integration to your form. You need to remove/delete PayPal Pro before you can add a new one.

The product listed in the Payment field will not be deleted, it will still remain after it is replaced by PayPal (standard).