PayPal form with signature

My contract won't accept signature 

They enter payment minimum, then it takes them to sign, but it won't acceptbit because of the PayPal info is invalid? How do I fox this? 

Thank you for contacting us.

Your form is currently missing a PayPal connection, so it will not redirect to the PayPal. Please add a PayPal field and configure it, see the next guide:

How to Integrate Form with Paypal (Standard)

If you need any further assistance on this, please let us know. We will be happy to help.