There are 2 possible causes:
- The z-index value for the navigation menu (or site header) for your site theme is higher than normal.
- Compensate for this by increasing the z-index value of your popup.
- In the Popup Editor, go to:
- ‘Popup Settings’ ->
- ‘Display’ option tab ->
- ‘Advanced’ option category ->
- ‘Popup Z-index’ selector.
- The default value for ‘Popup Z-Index’ is 1999999999. Add a few 0s to the end of each number. This increases the z-index value for the popup compared to the z-index value for the site theme.
This typically fixes a problem of this sort.
- Your site theme is likely including the WordPress function ‘wp_footer()’ inside a <div> with a z-index value not set to ‘auto’.
- Locate the template file in your theme that contains the function ‘wp_footer()’.
- Locate the containing <div> in that template file, and find the z-index value assigned to that <div>.
- Change the z-index value of the page template <div> from an {integer-value} to ‘auto’.
- Move the function ‘wp_footer()’ outside of the <div> container within the template file.
