You may run into the issue that your coupons are being displayed completely un-styled. This often happens after installing the plugin on a new site or updating it to a newer version.
What's the problem?
You're using a plugin which minifies CSS/Javascript assets and the newly added/updated styles/scripts of this plugin are not added to the minify cache yet. This might come from a caching plugin (e.g. WP Rocket) or a standalone plugin like Autoptimize.
How-to solve it?
Simply empty/trash the minify cache. The proceeding itself depends on the plugin you're using. In general, you will find an “Empty Minify Cache” link/button on the plugin settings page or the top admin menu.
Afterwards the styles/scripts should be loaded properly. In case you're still experiencing any issue, feel free to get in touch with us.