This can be a common issue but easy to fix. It means that the installation of the PHP programming language on your web host does not currently have support for reading and generating compressed ZIP files. This is needed for the plugin to be able to generate a .zip archive of your static website. Here's some hosting company and platform specific guides on how to fix:
After installing/enabling the ZIP extension for PHP, you will likely also need to restart your webserver (Apache or nginx) for it to be usable within WordPress and this plugin.
| displayCheckbox($this, 'allowOfflineUsage', "Check this if you're going to run your site locally, ie on a USB drive given to a client. All links will be made relative and no Destination URL will be used."); ?> | |
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displayTextfield($this, 'baseUrl-zip', 'http://mystaticsite.com', '', ''); ?>
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