We do not want to allow booking less than three tickets. How to do it?

Open the resource configuration. Create a tip. Fill in the following parameters:

1. Enter the name.

2. Specify the text of the message.

3. Choose the type of tip Error.

4. Click the Constraints tab.

Add a limit of the total shares - 2. Then it will be impossible to book one or two tickets. Save it.

The error text is displayed on a red background when you select options and in the cart.

But the Place order button in the shopping cart is inactive.

Look in action.