If you have configured a payment form using the payment plugin and the redirect to PayPal is not triggered when the form is submitted, then you will need to double check the following:
- the total of your transaction needs to be > 0
- you have properly added the (Payment) PayPal field to your form. This field can be found in the Payment section of the form component.
Important: In order for this to actually work, you will need to have the "Save data to database" option enabled. This option is found in the Form Properties tab.