When your Paywalls or add-ons can't take payments, MediaZilla tells you why on the item's Monetize tabs and on the Integrations page in Company Settings. Find the message you see below.
Monetization is not included in your plan
Your current plan doesn't include selling. Click View Plans to upgrade. If you're a Manager, ask an Admin to review the plan.
Stripe not connected
Payments go to your own Stripe account, and none is connected yet. Click Connect Stripe. If you're a Manager, ask an Admin to connect it. See How do I connect Stripe to my MediaZilla account?
Stripe connection needs attention
Stripe needs more information from you before it will accept payments. Click Review Stripe Connection and finish the steps Stripe asks for.
Until this is fixed, anyone who opens a Paywall link you've shared sees a disabled page instead of the buy button.
This add-on is not linked to your current Stripe account
The add-on was set up while a different Stripe account was connected, so buyers can't purchase it. Contact support and we'll relink it.
Other things to check
The Paywall is switched on with Enable Paywall and the content is published. See How do I sell content using a Paywall?
At least one of Buy or Rent is turned on, with a price.
The Monetization page's Opportunities tab lists paid content that needs a fix.