Can I make at least one checkbox in a group required in Webflow? If users don't select at least one checkbox, can I show an error message?

In Webflow, you can create a group of checkboxes and make at least one checkbox required by using a combination of Custom Code and interactions. Here's how you can accomplish this:

1. Create a group of checkboxes: Drag and drop the Checkbox element onto your page to create the checkboxes you need. Group them together by placing them inside a parent element like a Div Block.

2. Create an error message: Add an element (like a text element) below the checkboxes to display the error message when no checkbox is selected. Set its initial display to "None" so that it is hidden by default.

3. Add Custom Code: Go to the Site Settings panel (gear icon) and select the Custom Code tab. In the Footer Code section, add the following code:

```html

```

This code uses jQuery to detect changes in the checkboxes within the "checkbox-group" class. If no checkbox is checked, it displays the error message by setting its display property to "block"; otherwise, it hides the error message.

4. Assign classes: Give the parent element of the checkboxes the class "checkbox-group" so that the jQuery code can target the group of checkboxes.

5. Assign a class to the error message element: Give the error message element a class (e.g., "error-message") so that the jQuery code can target it and adjust its display property.

Once you've completed these steps, the error message will remain hidden until a user tries to submit the form without selecting at least one checkbox. At that point, the error message will be displayed, prompting the user to make a selection.

Note: This method requires some familiarity with HTML, CSS, and JavaScript. It's important to test the implementation thoroughly to ensure that it functions as intended.