When I Try To Pay, The Checkout Page Says "One Or More Of The Permits Selected Is Not Eligible For Payment"

Permit and Occupational License fees are only payable online once the permit has reached the status "Permit Approved" or the License has reached the status "Approved". You can view the latest status of your application on your Your Items page. If your fees are payable, you will see a "Pay Fees" link directly under your permit address or license type.