Worth walking through properly, because you will only ever see your own website as an administrator, and that hides things.
Look at it like a customer
Open your website in a private or incognito browser window.
This matters more than it sounds. Logged in as an administrator, you skip the registration step entirely, so you will never see the one error that catches most people out. Log out, and see what a stranger sees.
The journey
They land on your pricing page. They see your packages, with the one you marked as Popular highlighted.
They pick one and click. If they are not logged in, they are asked to register or sign in.
They register. This is the step that fails if you have not switched registration on. If Houzez refuses, they see the words “Access denied” and nothing else. They will not know why, and they will not come back.
Two settings prevent this: Anyone can register under Settings, then General in WordPress, and the Register toggle under Theme Options, then Login & Register.
They reach the checkout. They see the payment methods you switched on, and nothing else. If you left Houzez’s own Stripe, PayPal or Wire Transfer switched on, they see those too, stacked up next to Mollie, and it looks broken.
They pay. Mollie takes them to their bank or their card, and brings them back.
They land on your thank you page. You can write this yourself, under Theme Options, then Membership, in the Thank You Page section. Set a Title and a Message.
Write something human here. It is the first thing they read as a paying customer, and “Thank you for your order” is a wasted opportunity.
Their package activates. Immediately, by itself.
They get an email, with their invoice.
They can list a property. Their dashboard shows what they have bought and how many listings they have left.
Do this yourself, once
Before you go live, buy one of your own packages in test mode, logged out, in a private window, from start to finish.
It takes five minutes. It is the only way to know what you are actually selling, and it is the single most useful thing in this entire documentation.
You will find something. Everyone does.