There are many possible reasons that a payment plan was created and the purchase is not active. Once a payment plan is created he first payment will be processed. If the payment was not successful for any reason then you will not see access to your purchase in your account.
You may need to contact your credit card or Paypal to see why they have prevented the payment from going through. It may also be that the seller is having trouble receiving payments.
If you are unsure of why the payment could not be processed you can contact the product owner's support or contact JVZoo support here.
If the payment remains unsuccessful you can cancel the current plan and attempt to make the purchase again after ensuring that your bank or Paypal account is able to complete the payment.