OptimizeUrgency Thumbnail Icon Not Working
We have an issue we are working to resolve with the OptimizeUrgency plugin which means your icons may not show in the popup alerts
We are working for a fix for this - and will patch this very soon
Temporary Workaround
To fix this issue, use a plugin like "Header footer code manager" and add this code to the header of your pages:
<script src="https://use.fontawesome.com/2807d03b63.js"></script>
You will need to also add this plugin in the Styles and scripts screen to be enabled on the front end of your site.